update docs

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

en/application-dev/database/database-datashare-guidelines.md

@@ -40,7 +40,7 @@ There are two roles in **DataShare**:
 
 - **onCreate**
 
-  Called by the server to initialize service logic when the **DataShare** client connects to the **DataShareExtensionAbility** server. This method can be overridden as required.
+  Called by the server to initialize service logic when the **DataShare** client connects to the **DataShareExtensionAbility** server.
 
 - **insert**
 
@@ -76,10 +76,7 @@ Before implementing a **DataShare** service, you need to create a **DataShareExt
 
 2. Right-click the **DataShareAbility** directory, and choose **New > TypeScript File** to create a file named **DataShareAbility.ts**.
 
-3. In the **DataShareAbility.ts** file, import the **DataShareExtensionAbility** dependency package. You can override the service implementation as required. For example, if the data provider provides only the services for inserting, deleting, and querying data, you can override **insert()**, **delete()**, and **query()** only.
-
-
-4. Import dependencies.
+3. In the **DataShareAbility.ts** file, import **DataShareExtensionAbility** and other dependencies. 
 
    ```ts
    import Extension from '@ohos.application.DataShareExtensionAbility';
@@ -88,9 +85,9 @@ Before implementing a **DataShare** service, you need to create a **DataShareExt
    import dataSharePredicates from '@ohos.data.dataSharePredicates';
    ```
 
-5. Override **DataShareExtensionAbility** APIs based on actual requirements. For example, if the data provider provides only data query, override only **query()**.
+4. Override **DataShareExtensionAbility** APIs based on actual requirements. For example, if the data provider provides only data query, override only **query()**.
 
-6. Implement the data provider services. For example, implement data storage of the data provider by using a database, reading and writing files, or accessing the network.
+5. Implement the data provider services. For example, implement data storage of the data provider by using a database, reading and writing files, or accessing the network.
 
    ```ts
    const DB_NAME = "DB00.db";
@@ -146,14 +143,15 @@ Before implementing a **DataShare** service, you need to create a **DataShareExt
    };
    ```
 
-7. Define **DataShareExtensionAbility** in **module.json5**.
 
-   | Field| Description                                                    |
-   | ------------ | ------------------------------------------------------------ |
+6. Define **DataShareExtensionAbility** in **module.json5**.
+
+   | Field     | Description                                                  |
+   | --------- | ------------------------------------------------------------ |
    | "name"    | Ability name, corresponding to the **ExtensionAbility** class name derived from **Ability**. |
-   | "type"       | Ability type. The value is **dataShare**, indicating the development is based on the **datashare** template.|
+   | "type"    | Ability type. The value is **dataShare**, indicating the development is based on the **datashare** template. |
    | "uri"     | URI used for communication. It is the unique identifier for the data consumer to connect to the provider. |
-   | "visible"    | Whether it is visible to other applications. Data sharing is allowed only when the value is **true**.|
+   | "visible" | Whether it is visible to other applications. Data sharing is allowed only when the value is **true**. |
 
    **module.json5 example**
    
@@ -171,6 +169,8 @@ Before implementing a **DataShare** service, you need to create a **DataShareExt
    ]
    ```
    
+   
+
 ### Data Consumer Application Development
 
 1. Import dependencies.

en/application-dev/database/database-mdds-guidelines.md

@@ -119,7 +119,7 @@ The following uses a single KV store as an example to describe the development p
      }
      distributedKVStore.createKVManager(kvManagerConfig, function (err, manager) {
        if (err) {
-         console.error(`Failed to createKVManager.code is ${err.code},message is ${err.message}`);
+         console.error(`Failed to create KVManager. code is ${err.code},message is ${err.message}`);
          return;
        }
        console.log('Created KVManager successfully');

en/application-dev/database/database-preference-guidelines.md

@@ -200,6 +200,6 @@ You can use the following APIs to delete a **Preferences** instance or data file
    proDelete.then(() => {
         console.info("Deleted data successfully.");
    }).catch((err) => {
-       console.info("Failed to delete. Cause: " + err);
+       console.info("Failed to delete data. Cause: " + err);
    })
    ```