diff --git a/en/application-dev/reference/apis/js-apis-data-preferences.md b/en/application-dev/reference/apis/js-apis-data-preferences.md
index 153397a41d715c1814a143a4ff051e6964ba29eb..cad744cb266c3c5712de9d441fe0a56a1fc4ccbc 100644
--- a/en/application-dev/reference/apis/js-apis-data-preferences.md
+++ b/en/application-dev/reference/apis/js-apis-data-preferences.md
@@ -22,8 +22,8 @@ import data_preferences from '@ohos.data.preferences';
 
 | Name            | Type| Readable| Writable| Description                                   |
 | ---------------- | -------- | ---- | ---- | --------------------------------------- |
-| MAX_KEY_LENGTH   | string   | Yes  | No  | Maximum length of a key. The key must be less than 80 bytes.    |
-| MAX_VALUE_LENGTH | string   | Yes  | No  | Maximum length of a value. The value must be less than 8192 bytes.|
+| MAX_KEY_LENGTH   | number   | Yes  | No  | Maximum length of a key. The key must be less than 80 bytes.    |
+| MAX_VALUE_LENGTH | number   | Yes  | No  | Maximum length of a value. The value must be less than 8192 bytes.|
 
 
 ## data_preferences.getPreferences
@@ -50,16 +50,19 @@ FA model:
 // Obtain the context.
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
-
 let preferences = null;
-data_preferences.getPreferences(context, 'mystore', function (err, object) {
-    if (err) {
-        console.info("Failed to get the preferences. Cause: " + err);
-        return;
-    }
-    preferences = object;
-    console.info("Got the preferences successfully.");
-})
+
+try {
+    data_preferences.getPreferences(context, 'mystore', function (err, val) {
+        if (err) {
+	        console.info("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+	        return;
+	    }
+	    console.info("Got the preferences successfully.");
+	})
+} catch (err) {
+    console.info("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 Stage model:
@@ -75,14 +78,17 @@ class MainAbility extends Ability{
 }
 
 let preferences = null;
-data_preferences.getPreferences(context, 'mystore', function (err, object) {
-    if (err) {
-        console.info("Failed to get the preferences. Cause: " + err);
-        return;
-    }
-    preferences = object;
-    console.info("Got the preferences successfully.");
-})
+try {
+    data_preferences.getPreferences(context, 'mystore', function (err, val) {
+	    if (err) {
+	        console.info("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+	        return;
+	    }
+	    console.info("Got the preferences successfully.");
+	})
+} catch (err) {
+	console.info("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ## data_preferences.getPreferences
@@ -116,13 +122,17 @@ import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 
 let preferences = null;
-let promise = data_preferences.getPreferences(context, 'mystore');
-promise.then((object) => {
-    preferences = object;
-    console.info("Got the preferences successfully.");
-}).catch((err) => {
-    console.info("Failed to get the preferences. Cause: " + err);
-})
+try {
+    let promise = data_preferences.getPreferences(context, 'mystore');
+    promise.then((object) => {
+        preferences = object;
+        console.info("Got the preferences successfully.");
+    }).catch((err) => {
+        console.log("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.log("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 Stage model:
@@ -138,13 +148,17 @@ class MainAbility extends Ability{
 }
 
 let preferences = null;
-let promise = data_preferences.getPreferences(context, 'mystore');
-promise.then((object) => {
-    preferences = object;
-    console.info("Got the preferences successfully.");
-}).catch((err) => {
-    console.info("Failed to get the preferences. Cause: " + err);
-})
+try {
+    let promise = data_preferences.getPreferences(context, 'mystore');
+    promise.then((object) => {
+        preferences = object;
+        console.info("Got the preferences successfully.");
+    }).catch((err) => {
+        console.log("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.log("Failed to get the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ## data_preferences.deletePreferences
@@ -167,6 +181,14 @@ The deleted **Preferences** instance cannot be used for data operations. Otherwi
 | name     | string                                | Yes  | Name of the **Preferences** instance to delete.                          |
 | callback | AsyncCallback<void>             | Yes  | Callback invoked to return the result. If the operation is successful, **err** is **undefined**. Otherwise, **err** is an error code.|
 
+**Error codes**
+
+For details about the following error codes, see [Preference Error Codes](../errorcodes/errorcode-preferences.md).
+
+| ID| Error Message                      |
+| -------- | ------------------------------|
+| 15500010 | Failed to delete the preferences. |
+
 **Example**
 
 FA model:
@@ -176,13 +198,17 @@ FA model:
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 
-data_preferences.deletePreferences(context, 'mystore', function (err) {
-    if (err) {
-        console.info("Failed to delete the preferences. Cause: " + err);
-        return;
-    }
-    console.info("Deleted the preferences successfully." );
-})
+try {
+    data_preferences.deletePreferences(context, 'mystore', function (err, val) {
+        if (err) {
+            console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Deleted the preferences successfully." );
+    })
+} catch (err) {
+    console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 Stage model:
@@ -197,13 +223,17 @@ class MainAbility extends Ability{
     }
 }
 
-data_preferences.deletePreferences(context, 'mystore', function (err) {
-    if (err) {
-        console.info("Failed to delete the preferences. Cause: " + err);
-        return;
-    }
-    console.info("Deleted the preferences successfully." );
-})
+try {
+    data_preferences.deletePreferences(context, 'mystore', function (err, val) {
+        if (err) {
+            console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Deleted the preferences successfully." );
+    })
+} catch (err) {
+    console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ## data_preferences.deletePreferences
@@ -231,6 +261,14 @@ The deleted **Preferences** instance cannot be used for data operations. Otherwi
 | ------------------- | ------------------------- |
 | Promise<void> | Promise that returns no value.|
 
+**Error codes**
+
+For details about the following error codes, see [Preference Error Codes](../errorcodes/errorcode-preferences.md).
+
+| ID| Error Message                      |
+| -------- | ------------------------------|
+| 15500010 | Failed to delete the preferences. |
+
 **Example**
 
 FA model:
@@ -240,12 +278,16 @@ FA model:
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 
-let promise = data_preferences.deletePreferences(context, 'mystore');
-promise.then(() => {
-    console.info("Deleted the preferences successfully.");
-}).catch((err) => {
-    console.info("Failed to delete the preferences. Cause: " + err);
-})
+try {
+    let promise = data_preferences.deletePreferences(context, 'mystore');
+    promise.then(() => {
+        console.info("Deleted the preferences successfully.");
+    }).catch((err) => {
+        console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 Stage model:
@@ -260,12 +302,16 @@ class MainAbility extends Ability{
     }
 }
 
-let promise = data_preferences.deletePreferences(context, 'mystore');
-promise.then(() => {
-    console.info("Deleted the preferences successfully.");
-}).catch((err) => {
-    console.info("Failed to delete the preferences. Cause: " + err);
-})
+try{
+    let promise = data_preferences.deletePreferences(context, 'mystore');
+    promise.then(() => {
+        console.info("Deleted the preferences successfully.");
+    }).catch((err) => {
+        console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to delete the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ## data_preferences.removePreferencesFromCache
@@ -295,13 +341,17 @@ FA model:
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 
-data_preferences.removePreferencesFromCache(context, 'mystore', function (err) {
-    if (err) {
-        console.info("Failed to remove the preferences. Cause: " + err);
-        return;
-    }
-    console.info("Removed the preferences successfully.");
-})
+try {
+    data_preferences.removePreferencesFromCache(context, 'mystore', function (err, val) {
+        if (err) {
+            console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Removed the preferences successfully.");
+    })
+} catch (err) {
+    console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 Stage model:
@@ -316,13 +366,18 @@ class MainAbility extends Ability{
     }
 }
 
-data_preferences.removePreferencesFromCache(context, 'mystore', function (err) {
-    if (err) {
-        console.info("Failed to remove the preferences. Cause: " + err);
-        return;
-    }
-    console.info("Removed the preferences successfully.");
-})
+try {
+    data_preferences.removePreferencesFromCache(context, 'mystore', function (err, val) {
+        if (err) {
+            console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Removed the preferences successfully.");
+    })
+} catch (err) {
+    console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+}
+
 ```
 
 ## data_preferences.removePreferencesFromCache
@@ -357,12 +412,16 @@ FA model:
 import featureAbility from '@ohos.ability.featureAbility';
 let context = featureAbility.getContext();
 
-let promise = data_preferences.removePreferencesFromCache(context, 'mystore');
-promise.then(() => {
-    console.info("Removed the preferences successfully.");
-}).catch((err) => {
-    console.info("Failed to remove the preferences. Cause: " + err);
-})
+try {
+    let promise = data_preferences.removePreferencesFromCache(context, 'mystore');
+	promise.then(() => {
+    	console.info("Removed the preferences successfully.");
+    }).catch((err) => {
+        console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 Stage model:
@@ -377,12 +436,16 @@ class MainAbility extends Ability{
     }
 }
 
-let promise = data_preferences.removePreferencesFromCache(context, 'mystore');
-promise.then(() => {
-    console.info("Removed the preferences successfully.");
-}).catch((err) => {
-    console.info("Failed to remove the preferences. Cause: " + err);
-})
+try {
+    let promise = data_preferences.removePreferencesFromCache(context, 'mystore');
+	promise.then(() => {
+    	console.info("Removed the preferences successfully.");
+    }).catch((err) => {
+        console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to remove the preferences. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ## Preferences
@@ -411,13 +474,17 @@ Obtains the value of a key. This API uses an asynchronous callback to return the
 **Example**
 
 ```js
-preferences.get('startup', 'default', function(err, data) {
-    if (err) {
-        console.info("Failed to get the value of 'startup'. Cause: " + err);
-        return;
-    }
-    console.info("Got the value of 'startup'. Data: " + data);
-})
+try {
+    preferences.get('startup', 'default', function (err, val) {
+        if (err) {
+            console.info("Failed to get the value of 'startup'. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Obtained the value of 'startup' successfully. val: " + val);
+    })
+} catch (err) {
+    console.info("Failed to get the value of 'startup'. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -445,12 +512,16 @@ Obtains the value of a key. This API uses a promise to return the result. If the
 **Example**
 
 ```js
-let promise = preferences.get('startup', 'default');
-promise.then((data) => {
-    console.info("Got the value of 'startup'. Data: " + data);
-}).catch((err) => {
-    console.info("Failed to get the value of 'startup'. Cause: " + err);
-})
+try {
+    let promise = preferences.get('startup', 'default');
+    promise.then((data) => {
+        console.info("Got the value of 'startup'. Data: " + data);
+    }).catch((err) => {
+        console.info("Failed to get value of 'startup'. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to get the value of 'startup'. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ### getAll
@@ -470,15 +541,19 @@ Obtains an **Object** instance that contains all KV pairs. This API uses an asyn
 **Example**
 
 ```js
-preferences.getAll(function (err, value) {
-    if (err) {
-        console.info("Failed to get all KV pairs. Cause: " + err);
-        return;
-    }
+try {
+    preferences.getAll(function (err, value) {
+        if (err) {
+            console.info("Failed to get all KV pairs. code =" + err.code + ", message =" + err.message);
+            return;
+        }
     let allKeys = Object.keys(value);
     console.info("getAll keys = " + allKeys);
     console.info("getAll object = " + JSON.stringify(value));
-});
+    })
+} catch (err) {
+    console.info("Failed to get all KV pairs. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -499,14 +574,18 @@ Obtains an **Object** instance that contains all KV pairs. This API uses a promi
 **Example**
 
 ```js
-let promise = preferences.getAll();
-promise.then((value) => {
-    let allKeys = Object.keys(value);
-    console.info('getAll keys = ' + allKeys);
-    console.info("getAll object = " + JSON.stringify(value));
-}).catch((err) => {
-    console.info("Failed to get all KV pairs. Cause: " + err);
-})
+try {
+    let promise = preferences.getAll();
+    promise.then((value) => {
+        let allKeys = Object.keys(value);
+        console.info('getAll keys = ' + allKeys);
+        console.info("getAll object = " + JSON.stringify(value));
+    }).catch((err) => {
+        console.info("Failed to get all KV pairs. code =" + err.code + ", message =" + err.message);
+    })
+} catch (err) {
+    console.info("Failed to get all KV pairs. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ### put
@@ -528,13 +607,17 @@ Writes data to this **Preferences** instance. This API uses an asynchronous call
 **Example**
 
 ```js
-preferences.put('startup', 'auto', function (err) {
-    if (err) {
-        console.info("Failed to put the value of 'startup'. Cause: " + err);
-        return;
-    }
-    console.info("Put the value of 'startup' successfully.");
-})
+try {
+    preferences.put('startup', 'auto', function (err) {
+        if (err) {
+            console.info("Failed to put the value of 'startup'. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Put the value of 'startup' successfully.");
+    })
+} catch (err) {
+    console.info("Failed to put the value of 'startup'. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -562,12 +645,16 @@ Writes data to this **Preferences** instance. This API uses a promise to return
 **Example**
 
 ```js
-let promise = preferences.put('startup', 'auto');
-promise.then(() => {
-    console.info("Put the value of 'startup' successfully.");
-}).catch((err) => {
-    console.info("Failed to put the value of 'startup'. Cause: " + err);
-})
+try {
+    let promise = preferences.put('startup', 'auto');
+    promise.then(() => {
+        console.info("Put the value of 'startup' successfully.");
+    }).catch((err) => {
+        console.info("Failed to put the value of 'startup'. code =" + err.code +", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to put the value of 'startup'. code =" + err.code +", message =" + err.message);
+}
 ```
 
 
@@ -589,17 +676,21 @@ Checks whether this **Preferences** instance contains a KV pair with the given k
 **Example**
 
 ```js
-preferences.has('startup', function (err, isExist) {
-    if (err) {
-        console.info("Failed to check the key 'startup'. Cause: " + err);
-        return;
-    }
-    if (isExist) {
-        console.info("The key 'startup' is contained.");
-    } else {
-        console.info("The key 'startup' is not contained.");
-    }
-})
+try {
+    preferences.has('startup', function (err, val) {
+        if (err) {
+            console.info("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        if (val) {
+            console.info("The key 'startup' is contained.");
+        } else {
+            console.info("The key 'startup' is not contained.");
+        }
+  })
+} catch (err) {
+    console.info("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -626,16 +717,20 @@ Checks whether this **Preferences** instance contains a KV pair with the given k
 **Example**
 
 ```js
-let promise = preferences.has('startup');
-promise.then((isExist) => {
-    if (isExist) {
-        console.info("The key 'startup' is contained.");
-    } else {
-        console.info("The key 'startup' is not contained.");
-    }
-}).catch((err) => {
-    console.info("Failed to check the key 'startup'. Cause: " + err);
-})
+try {
+    let promise = preferences.has('startup');
+    promise.then((val) => {
+        if (val) {
+            console.info("The key 'startup' is contained.");
+        } else {
+            console.info("The key 'startup' is not contained.");
+        }
+    }).catch((err) => {
+        console.info("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+  })
+} catch(err) {
+    console.info("Failed to check the key 'startup'. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -643,7 +738,7 @@ promise.then((isExist) => {
 
 delete(key: string, callback: AsyncCallback<void>): void
 
-Deletes a KV pair from this **Preferences** instance. This API uses an asynchronous callback to return the result.
+Deletes a KV pair from this **Preferences** instance based on the specified key. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
@@ -657,13 +752,17 @@ Deletes a KV pair from this **Preferences** instance. This API uses an asynchron
 **Example**
 
 ```js
-preferences.delete('startup', function (err) {
-    if (err) {
-        console.info("Failed to delete the key 'startup'. Cause: " + err);
-        return;
-    }
-    console.info("Deleted the key 'startup'.");
-})
+try {
+    preferences.delete('startup', function (err) {
+        if (err) {
+            console.info("Failed to delete the key 'startup'. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Deleted the key 'startup'.");
+    })
+} catch (err) {
+    console.info("Failed to delete the key 'startup'. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -690,12 +789,16 @@ Deletes a KV pair from this **Preferences** instance. This API uses a promise to
 **Example**
 
 ```js
-let promise = preferences.delete('startup');
-promise.then(() => {
-    console.info("Deleted the key 'startup'.");
-}).catch((err) => {
-    console.info("Failed to delete the key 'startup'. Cause: " + err);
-})
+try {
+    let promise = preferences.delete('startup');
+	promise.then(() => {
+        console.info("Deleted the key 'startup'.");
+    }).catch((err) => {
+        console.log("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
+    })
+} catch(err) {
+    console.log("Failed to delete the key 'startup'. code =" + err.code +", message =" + err.message);
+}
 ```
 
 
@@ -716,13 +819,17 @@ Saves the data of this **Preferences** instance to a file asynchronously. This A
 **Example**
 
 ```js
-preferences.flush(function (err) {
-    if (err) {
-        console.info("Failed to flush data. Cause: " + err);
-        return;
-    }
-    console.info("Flushed data successfully.");
-})
+try {
+    preferences.flush(function (err) {
+        if (err) {
+            console.info("Failed to flush data. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Flushed data successfully.");
+    })
+} catch (err) {
+    console.info("Failed to flush data. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -743,12 +850,16 @@ Saves the data of this **Preferences** instance to a file asynchronously. This A
 **Example**
 
 ```js
-let promise = preferences.flush();
-promise.then(() => {
-    console.info("Flushed data to file successfully.")
-}).catch((err) => {
-    console.info("Failed to flush data. Cause: " + err);
-})
+try {
+    let promise = preferences.flush();
+    promise.then(() => {
+        console.info("Flushed data successfully.");
+    }).catch((err) => {
+        console.info("Failed to flush data. code =" + err.code + ", message =" + err.message);
+    })
+} catch (err) {
+    console.info("Failed to flush data. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -769,13 +880,17 @@ Clears this **Preferences** instance. This API uses an asynchronous callback to
 **Example**
 
 ```js
-preferences.clear(function (err) {
-    if (err) {
-        console.info("Failed to clear data. Cause: " + err);
-        return;
-    }
-    console.info("Cleared data successfully.");
-})
+try {
+	preferences.clear(function (err) {
+        if (err) {
+            console.info("Failed to clear data. code =" + err.code + ", message =" + err.message);
+            return;
+        }
+        console.info("Cleared data successfully.");
+    })
+} catch (err) {
+    console.info("Failed to clear data. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -796,12 +911,16 @@ Clears this **Preferences** instance. This API uses a promise to return the resu
 **Example**
 
 ```js
-let promise = preferences.clear()
-promise.then(() => {
-    console.info("Cleared data successfully.");
-}).catch((err) => {
-    console.info("Failed to clear data. Cause: " + err);
-})
+try {
+    let promise = preferences.clear();
+	promise.then(() => {
+    	console.info("Cleared data successfully.");
+    }).catch((err) => {
+        console.info("Failed to clear data. code =" + err.code + ", message =" + err.message);
+    })
+} catch(err) {
+    console.info("Failed to clear data. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -823,31 +942,35 @@ Subscribes to data changes. A callback will be triggered to return the new value
 **Example**
 
 ```js
-data_preferences.getPreferences(this.context, 'mystore', function (err, preferences) {
-    if (err) {
-        console.info("Failed to get the preferences.");
-        return;
-    }
-    let observer = function (key) {
-        console.info("The key " + key + " changed.");
-    }
-    preferences.on('change', observer);
-    preferences.put('startup', 'manual', function (err) {
-        if (err) {
-            console.info("Failed to put the value of 'startup'. Cause: " + err);
-            return;
-        }
-        console.info("Put the value of 'startup' successfully.");
-
-        preferences.flush(function (err) {
-            if (err) {
-                console.info("Failed to flush data. Cause: " + err);
-                return;
-            }
-            console.info("Flushed data successfully."); // The observer will be called.
-        })
-    })
-})
+try {
+	data_preferences.getPreferences(this.context, 'mystore', function (err, preferences) {
+		if (err) {
+			console.info("Failed to get the preferences.");
+			return;
+		}
+		let observer = function (key) {
+			console.info("The key " + key + " changed.");
+		}
+		preferences.on('change', observer);
+		preferences.put('startup', 'manual', function (err) {
+			if (err) {
+				console.info("Failed to put the value of 'startup'. Cause: " + err);
+				return;
+			}
+			console.info("Put the value of 'startup' successfully.");
+
+			preferences.flush(function (err) {
+				if (err) {
+					console.info("Failed to flush data. Cause: " + err);
+					return;
+				}
+				console.info("Flushed data successfully.");
+			})
+		})
+	})
+} catch (err) {
+	console.info("Failed to flush data. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 
@@ -869,32 +992,36 @@ Unsubscribes from data changes.
 **Example**
 
 ```js
-data_preferences.getPreferences(this.context, 'mystore', function (err, preferences) {
-    if (err) {
-        console.info("Failed to get the preferences.");
-        return;
-    }
-    let observer = function (key) {
-        console.info("The key " + key + " changed.");
-    }
-    preferences.on('change', observer);
-    preferences.put('startup', 'auto', function (err) {
+try {
+    data_preferences.getPreferences(this.context, 'mystore', function (err, preferences) {
         if (err) {
-            console.info("Failed to put the value of 'startup'. Cause: " + err);
+            console.info("Failed to get the preferences.");
             return;
         }
-        console.info("Put the value of 'startup' successfully.");
-
-        preferences.flush(function (err) {
+        let observer = function (key) {
+            console.info("The key " + key + " changed.");
+        }
+        preferences.on('change', observer);
+        preferences.put('startup', 'auto', function (err) {
             if (err) {
-                console.info("Failed to flush data. Cause: " + err);
+                console.info("Failed to put the value of 'startup'. Cause: " + err);
                 return;
             }
-            console.info("Flushed data successfully."); // The observer will be called.
+            console.info("Put the value of 'startup' successfully.");
+
+            preferences.flush(function (err) {
+                if (err) {
+                    console.info("Failed to flush data. Cause: " + err);
+                    return;
+                }
+                console.info("Flushed data successfully.");
+            })
+            preferences.off('change', observer);
         })
-        preferences.off('change', observer);
     })
-})
+} catch (err) {
+    console.info("Failed to flush data. code =" + err.code + ", message =" + err.message);
+}
 ```
 
 ## ValueType
diff --git a/en/application-dev/reference/apis/js-apis-data-resultset.md b/en/application-dev/reference/apis/js-apis-data-resultset.md
index 28cde770498760d5eac09dc79c5b495f91d05c4a..798ac7bba0926f47e1bc16eb6b672403bc082fa7 100644
--- a/en/application-dev/reference/apis/js-apis-data-resultset.md
+++ b/en/application-dev/reference/apis/js-apis-data-resultset.md
@@ -2,13 +2,551 @@
 
 A result set is a set of results returned after the relational database (RDB) query APIs are called. You can use the **resultset** APIs to obtain required data.
 
-> **NOTE**<br/>
+> **NOTE**
 > 
 > The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
-## Usage
+## ResultSetV9<sup>9+</sup>
 
-You need to use [RdbStore.query()](js-apis-data-rdb.md#query) to obtain a **resultSet** object.
+Provides methods to access the result set, which is obtained by querying the RDB store.
+
+### Usage
+
+You need to obtain the **resultSetV9** instance by using [RdbStoreV9.query()](js-apis-data-rdb.md#query).
+
+```js
+import dataRdb from '@ohos.data.rdb';
+let predicatesV9 = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+predicatesV9.equalTo("AGE", 18);
+let promise = rdbStoreV9.query(predicatesV9, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promise.then((resultSetV9) => {
+    console.log(TAG + "resultSet columnNames:" + resultSetV9.columnNames);
+    console.log(TAG + "resultSet columnCount:" + resultSetV9.columnCount);
+});
+```
+
+### Attributes<sup>9+</sup>
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+| Name        | Type           | Mandatory| Description                            |
+| ------------ | ------------------- | ---- | -------------------------------- |
+| columnNames  | Array&lt;string&gt; | Yes  | Names of all columns in the result set.      |
+| columnCount  | number              | Yes  | Number of columns in the result set.            |
+| rowCount     | number              | Yes  | Number of rows in the result set.            |
+| rowIndex     | number              | Yes  | Index of the current row in the result set.        |
+| isAtFirstRow | boolean             | Yes  | Whether the cursor is in the first row of the result set.      |
+| isAtLastRow  | boolean             | Yes  | Whether the cursor is in the last row of the result set.    |
+| isEnded      | boolean             | Yes  | Whether the cursor is after the last row of the result set.|
+| isStarted    | boolean             | Yes  | Whether the cursor has been moved.            |
+| isClosed     | boolean             | Yes  | Whether the result set is closed.        |
+
+### getColumnIndex<sup>9+</sup>
+
+getColumnIndex(columnName: string): number
+
+Obtains the column index based on the column name.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description                      |
+| ---------- | ------ | ---- | -------------------------- |
+| columnName | string | Yes  | Column name specified.|
+
+**Return value**
+
+| Type  | Description              |
+| ------ | ------------------ |
+| number | Index of the column obtained.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+resultSetV9.goToFirstRow();
+const id = resultSetV9.getLong(resultSetV9.getColumnIndex("ID"));
+const name = resultSetV9.getString(resultSetV9.getColumnIndex("NAME"));
+const age = resultSetV9.getLong(resultSetV9.getColumnIndex("AGE"));
+const salary = resultSetV9.getDouble(resultSetV9.getColumnIndex("SALARY"));
+  ```
+
+### getColumnName<sup>9+</sup>
+
+getColumnName(columnIndex: number): string
+
+Obtains the column name based on the column index.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory| Description                      |
+| ----------- | ------ | ---- | -------------------------- |
+| columnIndex | number | Yes  | Column index specified.|
+
+**Return value**
+
+| Type  | Description              |
+| ------ | ------------------ |
+| string | Column name obtained.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+const id = resultSetV9.getColumnName(0);
+const name = resultSetV9.getColumnName(1);
+const age = resultSetV9.getColumnName(2);
+  ```
+
+### goTo<sup>9+</sup>
+
+goTo(offset:number): boolean
+
+Moves the cursor to the row based on the specified offset.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name| Type  | Mandatory| Description                        |
+| ------ | ------ | ---- | ---------------------------- |
+| offset | number | Yes  | Offset relative to the current position.|
+
+**Return value**
+
+| Type   | Description                                         |
+| ------- | --------------------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+**Example**
+
+  ```js
+let predicatesV9goto = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promisequerygoto = rdbStoreV9.query(predicatesV9goto, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promisequerygoto.then((resultSetV9) => {
+    resultSetV9.goTo(1);
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('query failed');
+});
+  ```
+
+### goToRow<sup>9+</sup>
+
+goToRow(position: number): boolean
+
+Moves the cursor to the specified row in the result set.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name  | Type  | Mandatory| Description                    |
+| -------- | ------ | ---- | ------------------------ |
+| position | number | Yes  | Position to which the cursor is to be moved.|
+
+**Return value**
+
+| Type   | Description                                         |
+| ------- | --------------------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+**Example**
+
+  ```js
+let predicatesV9gotorow = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promisequerygotorow = rdbStoreV9.query(predicatesV9gotorow, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promisequerygotorow.then((resultSetV9) => {
+    resultSetV9.goToRow(5);
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('query failed');
+});
+  ```
+
+### goToFirstRow<sup>9+</sup>
+
+goToFirstRow(): boolean
+
+
+Moves the cursor to the first row of the result set.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Return value**
+
+| Type   | Description                                         |
+| ------- | --------------------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+**Example**
+
+  ```js
+let predicatesV9goFirst = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promisequerygoFirst = rdbStoreV9.query(predicatesV9goFirst, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promisequerygoFirst.then((resultSetV9) => {
+    resultSetV9.goToFirstRow();
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('query failed');
+});
+  ```
+
+### goToLastRow<sup>9+</sup>
+
+goToLastRow(): boolean
+
+Moves the cursor to the last row of the result set.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Return value**
+
+| Type   | Description                                         |
+| ------- | --------------------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+**Example**
+
+  ```js
+let predicatesV9goLast = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promisequerygoLast = rdbStoreV9.query(predicatesV9goLast, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promisequerygoLast.then((resultSetV9) => {
+    resultSetV9.goToLastRow();
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('query failed');
+});
+  ```
+
+### goToNextRow<sup>9+</sup>
+
+goToNextRow(): boolean
+
+Moves the cursor to the next row in the result set.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Return value**
+
+| Type   | Description                                         |
+| ------- | --------------------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+**Example**
+
+  ```js
+let predicatesV9goNext = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promisequerygoNext = rdbStoreV9.query(predicatesV9goNext, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promisequerygoNext.then((resultSetV9) => {
+    resultSetV9.goToNextRow();
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('query failed');
+});
+  ```
+
+### goToPreviousRow<sup>9+</sup>
+
+goToPreviousRow(): boolean
+
+Moves the cursor to the previous row in the result set.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Return value**
+
+| Type   | Description                                         |
+| ------- | --------------------------------------------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+**Example**
+
+  ```js
+let predicatesV9goPrev = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promisequerygoPrev = rdbStoreV9.query(predicatesV9goPrev, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promisequerygoPrev.then((resultSetV9) => {
+    resultSetV9.goToPreviousRow();
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('query failed');
+});
+  ```
+
+### getBlob<sup>9+</sup>
+
+getBlob(columnIndex: number): Uint8Array
+
+Obtains the value in the specified column in the current row as a byte array.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory| Description                   |
+| ----------- | ------ | ---- | ----------------------- |
+| columnIndex | number | Yes  | Index of the specified column, starting from 0.|
+
+**Return value**
+
+| Type      | Description                            |
+| ---------- | -------------------------------- |
+| Uint8Array | Value in the specified column as a byte array.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+const codes = resultSetV9.getBlob(resultSetV9.getColumnIndex("CODES"));
+  ```
+
+### getString<sup>9+</sup>
+
+getString(columnIndex: number): string
+
+Obtains the value in the specified column in the current row as a string.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory| Description                   |
+| ----------- | ------ | ---- | ----------------------- |
+| columnIndex | number | Yes  | Index of the specified column, starting from 0.|
+
+**Return value**
+
+| Type  | Description                        |
+| ------ | ---------------------------- |
+| string | Value in the specified column as a string.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+const name = resultSetV9.getString(resultSetV9.getColumnIndex("NAME"));
+  ```
+
+### getLong<sup>9+</sup>
+
+getLong(columnIndex: number): number
+
+Obtains the value in the specified column in the current row as a Long.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory| Description                   |
+| ----------- | ------ | ---- | ----------------------- |
+| columnIndex | number | Yes  | Index of the specified column, starting from 0.|
+
+**Return value**
+
+| Type  | Description                      |
+| ------ | -------------------------- |
+| number | Value in the specified column as a Long.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+const age = resultSetV9.getLong(resultSetV9.getColumnIndex("AGE"));
+  ```
+
+### getDouble<sup>9+</sup>
+
+getDouble(columnIndex: number): number
+
+Obtains the value in the specified column in the current row as a double.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory| Description                   |
+| ----------- | ------ | ---- | ----------------------- |
+| columnIndex | number | Yes  | Index of the specified column, starting from 0.|
+
+**Return value**
+
+| Type  | Description                        |
+| ------ | ---------------------------- |
+| number | Value in the specified column as a double.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+const salary = resultSetV9.getDouble(resultSetV9.getColumnIndex("SALARY"));
+  ```
+
+### isColumnNull<sup>9+</sup>
+
+isColumnNull(columnIndex: number): boolean
+
+Checks whether the value in the specified column of the current row is null.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Parameters**
+
+| Name     | Type  | Mandatory| Description                   |
+| ----------- | ------ | ---- | ----------------------- |
+| columnIndex | number | Yes  | Index of the specified column, starting from 0.|
+
+**Return value**
+
+| Type   | Description                                                     |
+| ------- | --------------------------------------------------------- |
+| boolean | Returns **true** if the value is null; returns **false** otherwise.|
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800013     | The column value is  null or the column type is incompatible. |
+
+**Example**
+
+  ```js
+const isColumnNull = resultSetV9.isColumnNull(resultSetV9.getColumnIndex("CODES"));
+  ```
+
+### close<sup>9+</sup>
+
+close(): void
+
+Closes this result set.
+
+**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
+
+**Example**
+
+  ```js
+let predicatesV9Close = new dataRdb.RdbPredicatesV9("EMPLOYEE");
+let promiseClose = rdbStoreV9.query(predicatesV9Close, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
+promiseClose.then((resultSetV9) => {
+    resultSetV9.close();
+}).catch((err) => {
+    console.log('Failed to close the resultset');
+});
+  ```
+
+**Error codes**
+
+For details about the error codes, see [RDB Error Codes](../errorcodes/errorcode-data-rdb.md).
+
+| ID| **Error Message**                                                |
+| ------------ | ------------------------------------------------------------ |
+| 14800012     | The result set is  empty or the specified location is invalid. |
+
+## ResultSet<sup>(deprecated)</sup>
+
+Provides methods to access the result set, which is obtained by querying the RDB store.
+
+> **NOTE**
+>
+> This object is supported since API version 7 and deprecated since API version 9. You are advised to use [ResultSetV9](#resultsetv99).
+
+### Usage
+
+You need to obtain a **resultSet** object by using [RdbStore.query()](js-apis-data-rdb.md#query).
 
 ```js
 import dataRdb from '@ohos.data.rdb';
@@ -21,11 +559,11 @@ promise.then((resultSet) => {
 });
 ```
 
-## ResultSet
+### Attributes<sup>(deprecated)</sup>
 
-Provides methods to access the result set, which is obtained by querying the RDB store.
-
-### Attributes
+> **NOTE**
+>
+> This parameter is supported since API version 7 and is deprecated since API version 9. You are advised to use [Attributes](#attributes9).
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
@@ -41,25 +579,29 @@ Provides methods to access the result set, which is obtained by querying the RDB
 | isStarted | boolean | Yes| Whether the cursor has been moved.|
 | isClosed | boolean | Yes| Whether the result set is closed.|
 
-### getColumnIndex
+### getColumnIndex<sup>(deprecated)</sup>
 
 getColumnIndex(columnName: string): number
 
 Obtains the column index based on the column name.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [getColumnIndex](#getcolumnindex9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnName | string | Yes| Column name specified.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnName | string | Yes| Column name specified.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | number | Index of the column obtained.|
+| Type| Description|
+| -------- | -------- |
+| number | Index of the column obtained.|
 
 **Example**
 
@@ -71,25 +613,29 @@ Obtains the column index based on the column name.
   const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY"));
   ```
 
-### getColumnName
+### getColumnName<sup>(deprecated)</sup>
 
 getColumnName(columnIndex: number): string
 
 Obtains the column name based on the column index.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [getColumnName](#getcolumnname9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnIndex | number | Yes| Column index specified.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnIndex | number | Yes| Column index specified.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | string | Column name obtained.|
+| Type| Description|
+| -------- | -------- |
+| string | Column name obtained.|
 
 **Example**
 
@@ -99,32 +645,36 @@ Obtains the column name based on the column index.
   const age = resultSet.getColumnName(2);
   ```
 
-### goTo
+### goTo<sup>(deprecated)</sup>
 
 goTo(offset:number): boolean
 
 Moves the cursor to the row based on the specified offset.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [goTo](#goto9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | offset | number | Yes| Offset relative to the current position.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| offset | number | Yes| Offset relative to the current position.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
 **Example**
 
   ```js
   let predicatesgoto = new dataRdb.RdbPredicates("EMPLOYEE");
   let promisequerygoto = rdbStore.query(predicatesgoto, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promisequerygoto.then((resultSet) {
+  promisequerygoto.then((resultSet) => {
       resultSet.goTo(1);
       resultSet.close();
   }).catch((err) => {
@@ -132,32 +682,36 @@ Moves the cursor to the row based on the specified offset.
   });
   ```
 
-### goToRow
+### goToRow<sup>(deprecated)</sup>
 
 goToRow(position: number): boolean
 
 Moves the cursor to the specified row in the result set.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [goToRow](#gotorow9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | position | number | Yes| Position to which the cursor is to be moved.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| position | number | Yes| Position to which the cursor is to be moved.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
 **Example**
 
   ```js
   let predicatesgotorow = new dataRdb.RdbPredicates("EMPLOYEE");
   let promisequerygotorow = rdbStore.query(predicatesgotorow, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promisequerygotorow.then((resultSet) {
+  promisequerygotorow.then((resultSet) => {
       resultSet.goToRow(5);
       resultSet.close();
   }).catch((err) => {
@@ -165,27 +719,30 @@ Moves the cursor to the specified row in the result set.
   });
   ```
 
-### goToFirstRow
+### goToFirstRow<sup>(deprecated)</sup>
 
 goToFirstRow(): boolean
 
-
 Moves the cursor to the first row of the result set.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [goToFirstRow](#gotofirstrow9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
 **Example**
 
   ```js
   let predicatesgoFirst = new dataRdb.RdbPredicates("EMPLOYEE");
   let promisequerygoFirst = rdbStore.query(predicatesgoFirst, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promisequerygoFirst.then((resultSet) {
+  promisequerygoFirst.then((resultSet) => {
       resultSet.goToFirstRow();
       resultSet.close();
   }).catch((err) => {
@@ -193,26 +750,30 @@ Moves the cursor to the first row of the result set.
   });
   ```
 
-### goToLastRow
+### goToLastRow<sup>(deprecated)</sup>
 
 goToLastRow(): boolean
 
 Moves the cursor to the last row of the result set.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [goToLastRow](#gotolastrow9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
 **Example**
 
   ```js
   let predicatesgoLast = new dataRdb.RdbPredicates("EMPLOYEE");
   let promisequerygoLast = rdbStore.query(predicatesgoLast, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promisequerygoLast.then((resultSet) {
+  promisequerygoLast.then((resultSet) => {
       resultSet.goToLastRow();
       resultSet.close();
   }).catch((err) => {
@@ -220,26 +781,30 @@ Moves the cursor to the last row of the result set.
   });
   ```
 
-### goToNextRow
+### goToNextRow<sup>(deprecated)</sup>
 
 goToNextRow(): boolean
 
 Moves the cursor to the next row in the result set.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [goToNextRow](#gotonextrow9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
 **Example**
 
   ```js
   let predicatesgoNext = new dataRdb.RdbPredicates("EMPLOYEE");
   let promisequerygoNext = rdbStore.query(predicatesgoNext, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promisequerygoNext.then((resultSet) {
+  promisequerygoNext.then((resultSet) => {
       resultSet.goToNextRow();
       resultSet.close();
   }).catch((err) => {
@@ -247,26 +812,30 @@ Moves the cursor to the next row in the result set.
   });
   ```
 
-### goToPreviousRow
+### goToPreviousRow<sup>(deprecated)</sup>
 
 goToPreviousRow(): boolean
 
 Moves the cursor to the previous row in the result set.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [goToPreviousRow](#gotopreviousrow9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
 **Example**
 
   ```js
   let predicatesgoPrev = new dataRdb.RdbPredicates("EMPLOYEE");
   let promisequerygoPrev = rdbStore.query(predicatesgoPrev, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promisequerygoPrev.then((resultSet) {
+  promisequerygoPrev.then((resultSet) => {
       resultSet.goToPreviousRow();
       resultSet.close();
   }).catch((err) => {
@@ -274,25 +843,29 @@ Moves the cursor to the previous row in the result set.
   });
   ```
 
-### getBlob
+### getBlob<sup>(deprecated)</sup>
 
 getBlob(columnIndex: number): Uint8Array
 
 Obtains the value in the specified column in the current row as a byte array.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [getBlob](#getblob9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnIndex | number | Yes| Index of the specified column, starting from 0.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | Uint8Array | Value in the specified column as a byte array.|
+| Type| Description|
+| -------- | -------- |
+| Uint8Array | Value in the specified column as a byte array.|
 
 **Example**
 
@@ -300,25 +873,29 @@ Obtains the value in the specified column in the current row as a byte array.
   const codes = resultSet.getBlob(resultSet.getColumnIndex("CODES"));
   ```
 
-### getString
+### getString<sup>(deprecated)</sup>
 
 getString(columnIndex: number): string
 
 Obtains the value in the specified column in the current row as a string.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [getString](#getstring9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnIndex | number | Yes| Index of the specified column, starting from 0.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | string | Value in the specified column as a string.|
+| Type| Description|
+| -------- | -------- |
+| string | Value in the specified column as a string.|
 
 **Example**
 
@@ -326,25 +903,29 @@ Obtains the value in the specified column in the current row as a string.
   const name = resultSet.getString(resultSet.getColumnIndex("NAME"));
   ```
 
-### getLong
+### getLong<sup>(deprecated)</sup>
 
 getLong(columnIndex: number): number
 
 Obtains the value in the specified column in the current row as a Long.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [getLong](#getlong9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnIndex | number | Yes| Index of the specified column, starting from 0.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | number | Value in the specified column as a Long.|
+| Type| Description|
+| -------- | -------- |
+| number | Value in the specified column as a Long.|
 
 **Example**
 
@@ -352,25 +933,29 @@ Obtains the value in the specified column in the current row as a Long.
   const age = resultSet.getLong(resultSet.getColumnIndex("AGE"));
   ```
 
-### getDouble
+### getDouble<sup>(deprecated)</sup>
 
 getDouble(columnIndex: number): number
 
 Obtains the value in the specified column in the current row as a double.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [getDouble](#getdouble9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnIndex | number | Yes| Index of the specified column, starting from 0.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | number | Value in the specified column as a double.|
+| Type| Description|
+| -------- | -------- |
+| number | Value in the specified column as a double.|
 
 **Example**
 
@@ -378,25 +963,29 @@ Obtains the value in the specified column in the current row as a double.
   const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY"));
   ```
 
-### isColumnNull
+### isColumnNull<sup>(deprecated)</sup>
 
 isColumnNull(columnIndex: number): boolean
 
 Checks whether the value in the specified column of the current row is null.
 
+> **NOTE**
+>
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [isColumnNull](#iscolumnnull9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Parameters**
 
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | columnIndex | number | Yes| Index of the specified column, starting from 0.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
 **Return value**
 
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Returns **true** if the value is null; returns **false** otherwise.|
+| Type| Description|
+| -------- | -------- |
+| boolean | Returns **true** if the value is null; returns **false** otherwise.|
 
 **Example**
 
@@ -404,12 +993,16 @@ Checks whether the value in the specified column of the current row is null.
   const isColumnNull = resultSet.isColumnNull(resultSet.getColumnIndex("CODES"));
   ```
 
-### close
+### close<sup>(deprecated)</sup>
 
 close(): void
 
 Closes this result set.
 
+> **NOTE**
+> 
+> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [close](#close9).
+
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
 **Example**
@@ -417,9 +1010,9 @@ Closes this result set.
   ```js
   let predicatesClose = new dataRdb.RdbPredicates("EMPLOYEE");
   let promiseClose = rdbStore.query(predicatesClose, ["ID", "NAME", "AGE", "SALARY", "CODES"]);
-  promiseClose.then((resultSet) {
+  promiseClose.then((resultSet) => {
       resultSet.close();
   }).catch((err) => {
-      console.log('Failed to close resultset');
+      console.log('Failed to close the resultset');
   });
   ```
diff --git a/en/application-dev/reference/apis/js-apis-data-storage.md b/en/application-dev/reference/apis/js-apis-data-storage.md
index f01e1a3ab8db3d7fb42d8362a35e29455066b15e..b724dfabc1fed1e99d98ad5bba715d81d91677b8 100644
--- a/en/application-dev/reference/apis/js-apis-data-storage.md
+++ b/en/application-dev/reference/apis/js-apis-data-storage.md
@@ -22,10 +22,10 @@ import data_storage from '@ohos.data.storage';
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-| Name             | Type   | Readable | Writable | Description                                                 |
-| ---------------- | ------ | -------- | -------- | ----------------------------------------------------------- |
-| MAX_KEY_LENGTH   | string | Yes      | No       | Maximum length of a key. It must be less than 80 bytes.     |
-| MAX_VALUE_LENGTH | string | Yes      | No       | Maximum length of a value. It must be less than 8192 bytes. |
+| Name            | Type| Readable| Writable| Description                                 |
+| ---------------- | -------- | ---- | ---- | ------------------------------------- |
+| MAX_KEY_LENGTH   | number   | Yes  | No  | Maximum length of a key. It must be less than 80 bytes.    |
+| MAX_VALUE_LENGTH | number   | Yes  | No  | Maximum length of a value. It must be less than 8192 bytes.|
 
 
 ## data_storage.getStorageSync
@@ -53,8 +53,8 @@ Reads the specified file and loads its data to the **Storage** instance for data
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -86,8 +86,8 @@ Reads the specified file and loads its data to the **Storage** instance for data
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -129,8 +129,8 @@ Reads the specified file and loads its data to the **Storage** instance for data
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -165,8 +165,8 @@ Deletes the singleton **Storage** instance of a file from the memory, and delete
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
     path = filePath;
     console.info("======================>getFilesDirPromise====================>");
@@ -195,8 +195,8 @@ Deletes the singleton **Storage** instance of a file from the memory, and delete
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -237,8 +237,8 @@ Deletes the singleton **Storage** instance of a file from the memory, and delete
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -271,8 +271,8 @@ Removes the singleton **Storage** instance of a file from the cache. The removed
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
     path = filePath;
     console.info("======================>getFilesDirPromise====================>");
@@ -302,8 +302,8 @@ Removes the singleton **Storage** instance of a file from the cache. The removed
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -344,8 +344,8 @@ Removes the singleton **Storage** instance of a file from the cache. The removed
 ```js
 import featureAbility from '@ohos.ability.featureAbility';
 
-var path;
-var context = featureAbility.getContext();
+let path;
+let context = featureAbility.getContext();
 context.getFilesDir().then((filePath) => {
   path = filePath;
   console.info("======================>getFilesDirPromise====================>");
@@ -864,15 +864,15 @@ Subscribes to data changes. The **StorageObserver** needs to be implemented. Whe
 
 **Parameters**
 
-| Name  | Type                                               | Description                                    |
-| -------- | --------------------------------------------------- | ---------------------------------------- |
-| type     | string                                              | Event type. The value **change** indicates data change events.|
-| callback | Callback&lt;[StorageObserver](#storageobserver)&gt; | Callback used to return data changes.                          |
+| Name  | Type                                               |  Mandatory| Description                                    |
+| -------- | --------------------------------------------------- | ------ |---------------------------------------- |
+| type     | string                                              |Yes| Event type. The value **change** indicates data change events.|
+| callback | Callback&lt;[StorageObserver](#storageobserver)&gt; | Yes|Callback used to return data changes.                          |
 
 **Example**
 
 ```js
-var observer = function (key) {
+let observer = function (key) {
     console.info("The key of " + key + " changed.");
 }
 storage.on('change', observer);
@@ -891,15 +891,15 @@ Unsubscribes from data changes.
 
 **Parameters**
 
-| Name  | Type                                               | Description                                    |
-| -------- | --------------------------------------------------- | ---------------------------------------- |
-| type     | string                                              | Event type. The value **change** indicates data change events.|
-| callback | Callback&lt;[StorageObserver](#storageobserver)&gt; | Callback used to return data changes.                |
+| Name  | Type                                               | Mandatory|  Description                                |
+| -------- | --------------------------------------------------- | ------ |---------------------------------------- |
+| type     | string                                              |Yes| Event type. The value **change** indicates data change events.|
+| callback | Callback&lt;[StorageObserver](#storageobserver)&gt; | Yes|Callback used to return data changes.                |
 
 **Example**
 
 ```js
-var observer = function (key) {
+let observer = function (key) {
     console.info("The key of " + key + " changed.");
 }
 storage.off('change', observer);
diff --git a/en/application-dev/reference/errorcodes/errorcode-data-rdb.md b/en/application-dev/reference/errorcodes/errorcode-data-rdb.md
new file mode 100644
index 0000000000000000000000000000000000000000..d7e89e178783267e178ef45da2174ce8cffd28ba
--- /dev/null
+++ b/en/application-dev/reference/errorcodes/errorcode-data-rdb.md
@@ -0,0 +1,79 @@
+# RDB Error Codes
+
+## 14800010 Invalid RDB Name
+
+**Error Message**
+
+Invalid database name.
+
+**Description**
+
+The RDB store name is invalid.
+
+**Possible Causes**
+
+The RDB store name is empty or exceeds 1024 bytes.
+
+**Solution**
+
+Check that the RDB store name is not empty and does not exceed 1024 bytes.
+
+## 14800011 Database File Corrupted
+
+**Error Message**
+
+Database corrupted.
+
+**Description**
+
+The RDB store is corrupted when an API for adding, deleting, querying, or synchronizing data is invoked.
+
+**Possible Causes**
+
+The RDB store file has been corrupted.
+
+**Solution**
+
+1. Restore the RDB store using the backup file.
+2. If no RDB backup file is available, delete the RDB store and create it again.
+
+## 14800012 Empty Result Set or Invalid Position
+
+**Error Message**
+
+The result set is empty or the specified location is invalid.
+
+**Description**
+
+The result set is empty or the specified location is invalid.
+
+**Possible Causes**
+
+The result set is empty, or the specified row number in the result set is out of range [0, m - 1]. **m** is **resultsetV9.rowCount**.
+
+**Solution**
+
+Check whether the result set is empty or whether the specified row number is out of range.
+
+## 14800013 Null Column Value or Column Data Type Incompatible With the API Called
+
+**Error Message**
+
+The column value is null or the column type is incompatible.
+
+**Description**
+
+The column value is null, or the column data type is incompatible with the API called.
+
+**Possible Causes**
+
+1. The result set is empty.
+2. The current row number in the result set is out of range [0, m - 1]. **m** is **resultsetV9.rowCount**.
+3. The column number is out of the range [0, n - 1]. **n** is **resultsetV9.columnCount**.
+4. The API called does not support the type of the column data.
+
+**Solution**
+
+1. Check whether the result set is empty.
+2. Check whether the row number and column number of the result set are out of range.
+3. Check whether the column data type is supported.
diff --git a/en/application-dev/reference/errorcodes/errorcode-preferences.md b/en/application-dev/reference/errorcodes/errorcode-preferences.md
new file mode 100644
index 0000000000000000000000000000000000000000..8abc1aaf4839704add8351d336b0f1bef8e154b9
--- /dev/null
+++ b/en/application-dev/reference/errorcodes/errorcode-preferences.md
@@ -0,0 +1,21 @@
+# Preferences Error Codes
+
+## 15500010 Failed to Delete Preferences
+**Error Message**
+
+Failed to delete preferences.
+
+**Description**
+
+Failed to delete the preference.
+
+**Possible Causes**
+
+The possible causes are as follows:
+1. The file name is incorrect.
+2. The file path is incorrect.
+
+**Solution**
+
+1. Check that the file name is correct.
+2. Check that the file path is correct.