update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/apis/js-apis-data-distributedobject.md

@@ -7,7 +7,7 @@
 ## Modules to Import
 
 ```js
-import distributedObject from '@ohos.data.distributedDataObject'
+import distributedObject from '@ohos.data.distributedDataObject';
 ```
 
 
@@ -25,11 +25,11 @@ Creates a distributed data object.
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | source | object | Yes| Attribute of the distributed data object to create.|
-  
+
 **Return Value**
-  | Type| Description|
-  | -------- | -------- |
-  | [DistributedObject](#distributedobject) | Distributed data object created.|
+| Type| Description|
+| -------- | -------- |
+| [DistributedObject](#distributedobject) | Distributed data object created.|
 
 **Example**
   ```js
@@ -83,7 +83,7 @@ Sets a session ID for synchronization. Automatic synchronization is performed fo
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the session ID is set successfully;<br>returns **false** otherwise. |
-  
+
 **Example**
 
   ```js
@@ -171,8 +171,6 @@ Subscribes to the status changes (online or offline) of this distributed data ob
   | type | string | Yes| Event type to subscribe to. The value is "status", which indicates the status (online or offline) change events.|
   | callback | Callback<{ sessionId: string, networkId: string, status: 'online' \| 'offline' }> | Yes| Callback used to return the online or offline status.<br>**sessionId** indicates the session ID of the distributed data object.<br>**networkId** indicates the network ID of the device.<br>**status** indicates the status, which can be online or offline.|
 
-
-
 **Example**
   ```js
   import distributedObject from '@ohos.data.distributedDataObject'

en/application-dev/reference/apis/js-apis-data-preferences.md

@@ -32,14 +32,14 @@ Reads a preference persistence file and loads data to the **Preferences** instan
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | context | [Context](js-apis-Context.md) | Yes| Context of the app or functionality.|
   | name | string | Yes| Name of the **Preferences** instance persistence file.|
   | callback | AsyncCallback<[Preferences](#preferences)> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -77,18 +77,18 @@ Reads a preference persistence file and loads data to the **Preferences** instan
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | context | [Context](js-apis-Context.md) | Yes| Context of the app or functionality.|
   | name | string | Yes| Name of the **Preferences** instance persistence file.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<[Preferences](#preferences)> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -126,14 +126,14 @@ Once a preference persistence file is deleted, the **Preferences** instance cann
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | context | [Context](js-apis-Context.md) | Yes| Context of the app or functionality.|
   | name | string | Yes| Name of the **Preferences** instance persistence file.|
   | callback | AsyncCallback<void> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -159,18 +159,18 @@ Once a preference persistence file is deleted, the **Preferences** instance cann
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | context | [Context](js-apis-Context.md) | Yes| Context of the app or functionality.|
   | name | string | Yes| Name of the **Preferences** instance persistence file.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<void> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -196,14 +196,14 @@ When a **Preferences** singleton instance is removed, this instance cannot be us
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | context | [Context](js-apis-Context.md) | Yes| Context of the app or functionality.|
   | name | string | Yes| Name of the **Preferences** instance persistence file.|
   | callback | AsyncCallback<void> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -230,18 +230,18 @@ When a **Preferences** singleton instance is removed, this instance cannot be us
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | context | [Context](js-apis-Context.md) | Yes| Context of the app or functionality.|
   | name | string | Yes| Name of the **Preferences** instance persistence file.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<void> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -270,14 +270,14 @@ Obtains the value of a key. If the value is null or a non-default value, the def
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the data to obtain. It cannot be empty.|
   | defValue | [ValueType](#valuetype) | Yes| Default value to be returned. It can be a number, string, or Boolean value.|
   | callback | AsyncCallback<ValueType> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -308,18 +308,18 @@ Obtains the value of a key. If the value is null or a non-default value, the def
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+- **Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the data to obtain. It cannot be empty.|
   | defValue | [ValueType](#valuetype) | Yes| Default value to be returned. It can be a number, string, or Boolean value.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<ValueType> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -344,18 +344,18 @@ Obtains the value of a key. If the value is null or a non-default value, the def
 
 put(key: string, value: ValueType, callback: AsyncCallback<void>): void
 
-Obtain a **Preferences** instance, writes data to the **Preferences** instance, and saves the data to the file using **flush()** or **flushSync()**. This API uses an asynchronous callback to return the execution result.
+Obtains a **Preferences** instance, writes data to the **Preferences** instance, and saves the data to the file using **flush()** or **flushSync()**. This API uses an asynchronous callback to return the execution result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the data. It cannot be empty.|
   | value | [ValueType](#valuetype) | Yes| New value to store. It can be a number, string, or Boolean value.|
   | callback | AsyncCallback<void> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -382,22 +382,22 @@ Obtain a **Preferences** instance, writes data to the **Preferences** instance,
 
 put(key: string, value: ValueType): Promise<void>
 
-Obtain a **Preferences** instance, writes data to the **Preferences** instance, and saves the data to the file using **flush()** or **flushSync()**. This API uses a promise to return the execution result.
+Obtains a **Preferences** instance, writes data to the **Preferences** instance, and saves the data to the file using **flush()** or **flushSync()**. This API uses a promise to return the execution result.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the data. It cannot be empty.|
   | value | [ValueType](#valuetype) | Yes| New value to store. It can be a number, string, or Boolean value.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<void> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -426,18 +426,18 @@ Checks whether the **Preferences** instance contains data with a given key. This
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the data to check. It cannot be empty.|
   | callback | AsyncCallback<boolean> | Yes| Callback used to return the execution result.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the **Preferences** instance contains data with the specified key; returns **false** otherwise.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -472,17 +472,17 @@ Checks whether the **Preferences** instance contains data with a given key. This
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the data to check. It cannot be empty.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<boolean> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -515,13 +515,13 @@ Deletes the KV pair of the specified key from this **Preferences** instance. Thi
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the KV pair to delete. It cannot be empty.|
   | callback | AsyncCallback<void> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -552,17 +552,17 @@ Deletes the KV pair of the specified key from this **Preferences** instance. Thi
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | key | string | Yes| Key of the KV pair to delete. It cannot be empty.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<void> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -591,12 +591,12 @@ Saves the modification to this **Preferences** instance and synchronizes the mod
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | callback | AsyncCallback<void> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -627,12 +627,12 @@ Saves the modification to this **Preferences** instance and synchronizes the mod
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<void> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -661,12 +661,12 @@ Clears data of this **Preferences** instance. This API uses an asynchronous call
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | callback | AsyncCallback<void> | Yes| Callback used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -697,12 +697,12 @@ Clears data of this **Preferences** instance. This API uses a promise to return
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Promise<void> | Promise used to return the execution result.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -731,13 +731,13 @@ Subscribes to data changes. When the value of the subscribed key changes, a call
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Description|
   | -------- | -------- | -------- |
   | type | string | Event type. The value **change** indicates data change events.|
   | callback | Callback<{ key : string }> | Callback used to return data changes.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'
@@ -779,13 +779,13 @@ Unsubscribes from data changes.
 
 **System capability**: SystemCapability.DistributedDataManager.Preferences.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Description|
   | -------- | -------- | -------- |
   | type | string | Event type. The value **change** indicates data change events.|
   | callback | Callback<{ key : string }> | Callback used to return data changes.|
 
-- Example
+**Example**
   ```ts
   import Ability from '@ohos.application.Ability'
   import data_preferences from '@ohos.data.preferences'

en/application-dev/reference/apis/js-apis-data-resultset.md

@@ -8,7 +8,7 @@
 
 You need to use [RdbStore.query()](js-apis-data-rdb.md#query) to obtain the **resultSet** object.
 
-```
+```js
 import dataRdb from '@ohos.data.rdb';
 let predicates = new dataRdb.RdbPredicates("EMPLOYEE")
 predicates.equalTo("AGE", 18)
@@ -18,10 +18,6 @@ promise.then((resultSet) => {
     console.log(TAG + "resultSet columnCount:" + resultSet.columnCount);})
 ```
 
-
-
-
-
 ## ResultSet
 
 Provides methods to access the result set, which is obtained by querying the relational database (RDB) store.
@@ -52,18 +48,18 @@ Obtains the column index based on the column name.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnName | string | Yes| Column name specified.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | number | Index of the column obtained.|
 
-- Example
-  ```
+**Example**
+  ```js
   resultSet.goToFirstRow()
   const id = resultSet.getLong(resultSet.getColumnIndex("ID"))
   const name = resultSet.getString(resultSet.getColumnIndex("NAME"))
@@ -80,18 +76,18 @@ Obtains the column name based on the column index.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnIndex | number | Yes| Column index specified.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | string | Column name obtained.|
 
-- Example
-  ```
+**Example**
+  ```js
   const id = resultSet.getColumnName(0)
   const name = resultSet.getColumnName(1)
   const age = resultSet.getColumnName(2)
@@ -106,18 +102,18 @@ Moves the cursor to the row based on the specified offset.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | offset | number | Yes| Offset relative to the current position.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   let predicatesgoto = new dataRdb.RdbPredicates("EMPLOYEE")
   let promisequerygoto = rdbStore.query(predicatesgoto, ["ID", "NAME", "AGE", "SALARY", "CODES"])
   promisequerygoto.then((resultSet) {
@@ -137,18 +133,18 @@ Moves the cursor to the specified row in the result set.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | position | number | Yes| Position to which the cursor is to be moved.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   let predicatesgotorow = new dataRdb.RdbPredicates("EMPLOYEE")
   let promisequerygotorow = rdbStore.query(predicatesgotorow, ["ID", "NAME", "AGE", "SALARY", "CODES"])
   promisequerygotorow.then((resultSet) {
@@ -169,13 +165,13 @@ Moves the cursor to the first row of the result set.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   let predicatesgoFirst = new dataRdb.RdbPredicates("EMPLOYEE")
   let promisequerygoFirst = rdbStore.query(predicatesgoFirst, ["ID", "NAME", "AGE", "SALARY", "CODES"])
   promisequerygoFirst.then((resultSet) {
@@ -195,13 +191,13 @@ Moves the cursor to the last row of the result set.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   let predicatesgoLast = new dataRdb.RdbPredicates("EMPLOYEE")
   let promisequerygoLast = rdbStore.query(predicatesgoLast, ["ID", "NAME", "AGE", "SALARY", "CODES"])
   promisequerygoLast.then((resultSet) {
@@ -221,13 +217,13 @@ Moves the cursor to the next row in the result set.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   let predicatesgoNext = new dataRdb.RdbPredicates("EMPLOYEE")
   let promisequerygoNext = rdbStore.query(predicatesgoNext, ["ID", "NAME", "AGE", "SALARY", "CODES"])
   promisequerygoNext.then((resultSet) {
@@ -247,13 +243,13 @@ Moves the cursor to the previous row in the result set.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   let predicatesgoPrev = new dataRdb.RdbPredicates("EMPLOYEE")
   let promisequerygoPrev = rdbStore.query(predicatesgoPrev, ["ID", "NAME", "AGE", "SALARY", "CODES"])
   promisequerygoPrev.then((resultSet) {
@@ -273,18 +269,18 @@ Obtains the value in the specified column in the current row as a byte array.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | Uint8Array | Value in the specified column as a byte array.|
 
-- Example
-  ```
+**Example**
+  ```js
   const codes = resultSet.getBlob(resultSet.getColumnIndex("CODES"))
   ```
 
@@ -297,18 +293,18 @@ Obtains the value in the specified column in the current row as a string.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | string | Value in the specified column as a string.|
 
-- Example
-  ```
+**Example**
+  ```js
   const name = resultSet.getString(resultSet.getColumnIndex("NAME"))
   ```
 
@@ -321,18 +317,18 @@ Obtains the value in the specified column in the current row as a Long.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | number | Value in the specified column as a Long.|
 
-- Example
-  ```
+**Example**
+  ```js
   const age = resultSet.getLong(resultSet.getColumnIndex("AGE"))
   ```
 
@@ -345,18 +341,18 @@ Obtains the value in the specified column in the current row as a double.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | number | Value in the specified column as a double.|
 
-- Example
-  ```
+**Example**
+  ```js
   const salary = resultSet.getDouble(resultSet.getColumnIndex("SALARY"))
   ```
 
@@ -369,18 +365,18 @@ Checks whether the value in the specified column of the current row is null.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Parameters
+**Parameters**
   | Name| Type| Mandatory| Description|
   | -------- | -------- | -------- | -------- |
   | columnIndex | number | Yes| Index of the specified column, starting from 0.|
 
-- Return value
+**Return value**
   | Type| Description|
   | -------- | -------- |
   | boolean | Returns **true** if the value is null; returns **false** otherwise.|
 
-- Example
-  ```
+**Example**
+  ```js
   const isColumnNull = resultSet.isColumnNull(resultSet.getColumnIndex("CODES"))
   ```
 
@@ -393,13 +389,13 @@ Closes this result set.
 
 **System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
 
-- Example
-  ```
-  let predicatesclose = new dataRdb.RdbPredicates("EMPLOYEE")
-  let predicatesclose = rdbStore.query(predicatesclose, ["ID", "NAME", "AGE", "SALARY", "CODES"])
-  promisequerygoPrev.then((resultSet) {
+**Example**
+  ```js
+  let predicatesClose = new dataRdb.RdbPredicates("EMPLOYEE")
+  let promiseClose = rdbStore.query(predicatesClose, ["ID", "NAME", "AGE", "SALARY", "CODES"])
+  promiseClose.then((resultSet) {
       resultSet.close()
   }).catch((err) => {
-      console.log('query failed')
+      console.log('Failed to close resultset')
   })
   ```