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!8360 【翻译完成】#I5M2CG 

Merge pull request !8360 from Annie_wang/PR8072
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en/application-dev/reference/apis/js-apis-data-rdb.md
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......@@ -4,10 +4,10 @@ The relational database (RDB) manages data based on relational models. With the
This module provides the following RDB-related functions:
- [RdbPredicates](#rdbpredicates): predicates indicating the nature, feature, or relationship of a data entity in an RDB store. It is used to define the operation conditions for an RDB store.
- [RdbPredicates](#rdbpredicates): provides predicates indicating the nature, feature, or relationship of a data entity in an RDB store. It is used to define the operation conditions for an RDB store.
- [RdbStore](#rdbstore): provides APIs for managing an RDB store.
> **NOTE**
> **NOTE**<br/>
>
> 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.
......@@ -51,7 +51,7 @@ data_rdb.getRdbStore(this.context, STORE_CONFIG, 1, function (err, rdbStore) {
getRdbStore(context: Context, config: StoreConfig, version: number): Promise&lt;RdbStore&gt;
Obtains an RDB store. This API uses a promise to return the result. You can set parameters for the RDB store based on service requirements and call APIs to perform data operations.
Obtains an RDB store. This API uses a promise to return the result. You can set parameters for the RDB store based on service requirements, and then call APIs to perform data operations.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -85,7 +85,7 @@ promise.then(async (rdbStore) => {
deleteRdbStore(context: Context, name: string, callback: AsyncCallback&lt;void&gt;): void
Deletes an RDB store. This API uses an asynchronous callback to return the result.
Deletes an RDB store. This API uses an asynchronous callback to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -166,14 +166,14 @@ let predicates = new data_rdb.RdbPredicates("EMPLOYEE")
inDevices(devices: Array&lt;string&gt;): RdbPredicates
Specifies a remote device on the network during distributed database synchronization.
Connects to the specified remote devices on the network during distributed database synchronization.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
**Parameters**
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| devices | Array&lt;string&gt; | Yes| ID of the remote device to specify.|
| devices | Array&lt;string&gt; | Yes| IDs of the remote devices in the same network.|
**Return value**
| Type| Description|
......@@ -211,7 +211,7 @@ predicates.inAllDevices()
equalTo(field: string, value: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value equal to the specified value.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value equal to the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -238,7 +238,7 @@ predicates.equalTo("NAME", "lisi")
notEqualTo(field: string, value: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value not equal to the specified value.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value not equal to the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -362,7 +362,7 @@ predicates.equalTo("NAME", "Lisa")
contains(field: string, value: string): RdbPredicates
Sets the **RdbPredicates** to match a string containing the specified value.
Sets an **RdbPredicates** to match a string containing the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -389,7 +389,7 @@ predicates.contains("NAME", "os")
beginsWith(field: string, value: string): RdbPredicates
Sets the **RdbPredicates** to match a string that starts with the specified value.
Sets an **RdbPredicates** to match a string that starts with the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -416,7 +416,7 @@ predicates.beginsWith("NAME", "os")
endsWith(field: string, value: string): RdbPredicates
Sets the **RdbPredicates** to match a string that ends with the specified value.
Sets an **RdbPredicates** to match a string that ends with the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -443,7 +443,7 @@ predicates.endsWith("NAME", "se")
isNull(field: string): RdbPredicates
Sets the **RdbPredicates** to match the field whose value is null.
Sets an **RdbPredicates** to match the field whose value is null.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -469,7 +469,7 @@ predicates.isNull("NAME")
isNotNull(field: string): RdbPredicates
Sets the **RdbPredicates** to match the field whose value is not null.
Sets an **RdbPredicates** to match the field whose value is not null.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -495,7 +495,7 @@ predicates.isNotNull("NAME")
like(field: string, value: string): RdbPredicates
Sets the **RdbPredicates** to match a string that is similar to the specified value.
Sets an **RdbPredicates** to match a string that is similar to the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -522,7 +522,7 @@ predicates.like("NAME", "%os%")
glob(field: string, value: string): RdbPredicates
Sets the **RdbPredicates** to match the specified string.
Sets an **RdbPredicates** to match the specified string.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -549,7 +549,7 @@ predicates.glob("NAME", "?h*g")
between(field: string, low: ValueType, high: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value within the specified range.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value within the specified range.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -577,7 +577,7 @@ predicates.between("AGE", 10, 50)
notBetween(field: string, low: ValueType, high: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value out of the specified range.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value out of the specified range.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -604,7 +604,7 @@ predicates.notBetween("AGE", 10, 50)
greaterThan(field: string, value: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value greater than the specified value.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value greater than the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -631,7 +631,7 @@ predicates.greaterThan("AGE", 18)
lessThan(field: string, value: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value less than the specified value.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value less than the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -659,7 +659,7 @@ predicates.lessThan("AGE", 20)
greaterThanOrEqualTo(field: string, value: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value greater than or equal to the specified value.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value greater than or equal to the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -687,7 +687,7 @@ predicates.greaterThanOrEqualTo("AGE", 18)
lessThanOrEqualTo(field: string, value: ValueType): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **ValueType** and value less than or equal to the specified value.
Sets an **RdbPredicates** to match the field with data type **ValueType** and value less than or equal to the specified value.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -715,7 +715,7 @@ predicates.lessThanOrEqualTo("AGE", 20)
orderByAsc(field: string): RdbPredicates
Sets the **RdbPredicates** to match the column with values sorted in ascending order.
Sets an **RdbPredicates** to match the column with values sorted in ascending order.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -742,7 +742,7 @@ predicates.orderByAsc("NAME")
orderByDesc(field: string): RdbPredicates
Sets the **RdbPredicates** to match the column with values sorted in descending order.
Sets an **RdbPredicates** to match the column with values sorted in descending order.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -768,7 +768,7 @@ predicates.orderByDesc("AGE")
distinct(): RdbPredicates
Sets the **RdbPredicates** to filter out duplicate records.
Sets an **RdbPredicates** to filter out duplicate records.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -796,7 +796,7 @@ promise.then((resultSet) => {
limitAs(value: number): RdbPredicates
Sets the **RdbPredicates** to specify the maximum number of records.
Sets an **RdbPredicates** to specify the maximum number of records.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -822,7 +822,7 @@ predicates.equalTo("NAME", "Rose").limitAs(3)
offsetAs(rowOffset: number): RdbPredicates
Sets the **RdbPredicates** to specify the start position of the returned result.
Sets an **RdbPredicates** to specify the start position of the returned result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -848,7 +848,7 @@ predicates.equalTo("NAME", "Rose").offsetAs(3)
groupBy(fields: Array&lt;string&gt;): RdbPredicates
Sets the **RdbPredicates** to group rows that have the same value into summary rows.
Sets an **RdbPredicates** to group rows that have the same value into summary rows.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -873,7 +873,7 @@ predicates.groupBy(["AGE", "NAME"])
indexedBy(field: string): RdbPredicates
Sets the **RdbPredicates** object to specify the index column.
Sets an **RdbPredicates** object to specify the index column.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -900,7 +900,7 @@ predicates.indexedBy("SALARY_INDEX")
in(field: string, value: Array&lt;ValueType&gt;): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **Array&#60;ValueType&#62;** and value within the specified range.
Sets an **RdbPredicates** to match the field with data type **Array&#60;ValueType&#62;** and value within the specified range.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -928,7 +928,7 @@ predicates.in("AGE", [18, 20])
notIn(field: string, value: Array&lt;ValueType&gt;): RdbPredicates
Sets the **RdbPredicates** to match the field with data type **Array&#60;ValueType&#62;** and value out of the specified range.
Sets an **RdbPredicates** to match the field with data type **Array&#60;ValueType&#62;** and value out of the specified range.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -955,6 +955,8 @@ predicates.notIn("NAME", ["Lisa", "Rose"])
Provides methods to manage an RDB store.
Before using the following APIs, use [executeSql](#executesql) to initialize the database table structure and related data. For details, see [RDB Development](../../database/database-relational-guidelines.md).
### insert
......@@ -984,7 +986,7 @@ rdbStore.insert("EMPLOYEE", valueBucket, function (err, ret) {
console.info("Failed to insert data, err: " + err)
return
}
console.log("Insert first done: " + ret)
console.log("Inserted first row: " + ret)
})
```
......@@ -1018,7 +1020,7 @@ const valueBucket = {
}
let promise = rdbStore.insert("EMPLOYEE", valueBucket)
promise.then(async (ret) => {
console.log("Insert first done: " + ret)
console.log("Inserted first row: " + ret)
}).catch((err) => {
console.log("Failed to insert data, err: " + err)
})
......@@ -1029,7 +1031,7 @@ promise.then(async (ret) => {
update(values: ValuesBucket, rdbPredicates: RdbPredicates, callback: AsyncCallback&lt;number&gt;):void
Updates data in the database based on the specified RdbPredicates object. This API uses an asynchronous callback to return the result.
Updates data in the RDB store based on the specified **RdbPredicates** object. This API uses an asynchronous callback to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1037,7 +1039,7 @@ Updates data in the database based on the specified RdbPredicates object. This A
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| values | [ValuesBucket](#valuesbucket) | Yes| Data to update. The value specifies the row of data to be updated in the database. The key-value pair is associated with the column name in the target table.|
| rdbPredicates | [RdbPredicates](#rdbpredicates) | Yes| Row of data to insert.|
| rdbPredicates | [RdbPredicates](#rdbpredicates) | Yes| Update conditions specified by the **RdbPredicates** object.|
| callback | AsyncCallback&lt;number&gt; | Yes| Callback invoked to return the number of rows updated.|
**Example**
......@@ -1064,7 +1066,7 @@ rdbStore.update(valueBucket, predicates, function (err, ret) {
update(values: ValuesBucket, rdbPredicates: RdbPredicates):Promise&lt;number&gt;
Updates data in the database based on the specified RdbPredicates object. This API uses a promise to return the result.
Updates data in the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1072,7 +1074,7 @@ Updates data in the database based on the specified RdbPredicates object. This A
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| values | [ValuesBucket](#valuesbucket) | Yes| Data to update. The value specifies the row of data to be updated in the database. The key-value pair is associated with the column name in the target table.|
| rdbPredicates | [RdbPredicates](#rdbpredicates) | Yes| Row of data to insert.|
| rdbPredicates | [RdbPredicates](#rdbpredicates) | Yes| Update conditions specified by the **RdbPredicates** object.|
**Return value**
| Type| Description|
......@@ -1103,7 +1105,7 @@ promise.then(async (ret) => {
delete(rdbPredicates: RdbPredicates, callback: AsyncCallback&lt;number&gt;):void
Deletes data from the database based on the specified **RdbPredicates** object. This API uses a callback to return the result.
Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses an asynchronous callback to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1122,7 +1124,7 @@ rdbStore.delete(predicates, function (err, rows) {
console.info("Failed to delete data, err: " + err)
return
}
console.log("Delete rows: " + rows)
console.log("Deleted rows: " + rows)
})
```
......@@ -1131,7 +1133,7 @@ rdbStore.delete(predicates, function (err, rows) {
delete(rdbPredicates: RdbPredicates):Promise&lt;number&gt;
Deletes data from the database based on the specified **RdbPredicates** object. This API uses a promise to return the result.
Deletes data from the RDB store based on the specified **RdbPredicates** object. This API uses a promise to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1151,7 +1153,7 @@ let predicates = new data_rdb.RdbPredicates("EMPLOYEE")
predicates.equalTo("NAME", "Lisa")
let promise = rdbStore.delete(predicates)
promise.then((rows) => {
console.log("Delete rows: " + rows)
console.log("Deleted rows: " + rows)
}).catch((err) => {
console.info("Failed to delete data, err: " + err)
})
......@@ -1162,7 +1164,7 @@ promise.then((rows) => {
query(rdbPredicates: RdbPredicates, columns: Array&lt;string&gt;, callback: AsyncCallback&lt;ResultSet&gt;):void
Queries data in the database based on specified conditions. This API uses an asynchronous callback to return the result.
Queries data in the RDB store based on specified conditions. This API uses an asynchronous callback to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1192,7 +1194,7 @@ rdbStore.query(predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"], function (e
query(rdbPredicates: RdbPredicates, columns?: Array&lt;string&gt;):Promise&lt;ResultSet&gt;
Queries data in the database based on specified conditions. This API uses a promise to return the result.
Queries data in the RDB store based on specified conditions. This API uses a promise to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1205,7 +1207,7 @@ Queries data in the database based on specified conditions. This API uses a prom
**Return value**
| Type| Description|
| -------- | -------- |
| Promise&lt;[ResultSet](../apis/js-apis-data-resultset.md)&gt; | Promise used to return the result. If the operation is successful, a **ResultSet** object will be returned.|
| Promise&lt;[ResultSet](js-apis-data-resultset.md)&gt; | Promise used to return the result. If the operation is successful, a **ResultSet** object will be returned.|
**Example**
```js
......@@ -1233,7 +1235,7 @@ Queries data in the RDB store using the specified SQL statement. This API uses a
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| sql | string | Yes| SQL statement to run.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | Yes| Values of the parameters in the SQL statement.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | Yes| Arguments in the SQL statement.|
| callback | AsyncCallback&lt;[ResultSet](js-apis-data-resultset.md)&gt; | Yes| Callback invoked to return the result. If the operation is successful, a **ResultSet** object will be returned.|
**Example**
......@@ -1261,12 +1263,12 @@ Queries data in the RDB store using the specified SQL statement. This API uses a
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| sql | string | Yes| SQL statement to run.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | No| Values of the parameters in the SQL statement.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | No| Arguments in the SQL statement.|
**Return value**
| Type| Description|
| -------- | -------- |
| Promise&lt;[ResultSet](../apis/js-apis-data-resultset.md)&gt; | Promise used to return the result. If the operation is successful, a **ResultSet** object will be returned.|
| Promise&lt;[ResultSet](js-apis-data-resultset.md)&gt; | Promise used to return the result. If the operation is successful, a **ResultSet** object will be returned.|
**Example**
```js
......@@ -1292,7 +1294,7 @@ Runs the SQL statement that contains the specified parameters but does not retur
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| sql | string | Yes| SQL statement to run.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | Yes| Values of the parameters in the SQL statement.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | Yes| Arguments in the SQL statement.|
| callback | AsyncCallback&lt;void&gt; | Yes| Callback invoked to return the result.|
**Example**
......@@ -1303,7 +1305,7 @@ rdbStore.executeSql(SQL_CREATE_TABLE, null, function(err) {
console.info("Failed to execute SQL, err: " + err)
return
}
console.info('create table done.')
console.info('Created table successfully.')
})
```
......@@ -1320,7 +1322,7 @@ Runs the SQL statement that contains the specified parameters but does not retur
| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| sql | string | Yes| SQL statement to run.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | No| Values of the parameters in the SQL statement.|
| bindArgs | Array&lt;[ValueType](#valuetype)&gt; | No| Arguments in the SQL statement.|
**Return value**
| Type| Description|
......@@ -1332,7 +1334,7 @@ Runs the SQL statement that contains the specified parameters but does not retur
const SQL_CREATE_TABLE = "CREATE TABLE IF NOT EXISTS EMPLOYEE (ID INTEGER PRIMARY KEY AUTOINCREMENT, NAME TEXT NOT NULL, AGE INTEGER, SALARY REAL, CODES BLOB)"
let promise = rdbStore.executeSql(SQL_CREATE_TABLE)
promise.then(() => {
console.info('create table done.')
console.info('Created table successfully.')
}).catch((err) => {
console.info("Failed to execute SQL, err: " + err)
})
......@@ -1449,7 +1451,7 @@ rdbStore.setDistributedTables(["EMPLOYEE"], function (err) {
console.info('Failed to set distributed tables, err: ' + err)
return
}
console.info('setDistributedTables successfully.')
console.info('Set distributed tables successfully.')
})
```
......@@ -1476,7 +1478,7 @@ Sets a list of distributed tables. This API uses a promise to return the result.
```js
let promise = rdbStore.setDistributedTables(["EMPLOYEE"])
promise.then(() => {
console.info("setDistributedTables successfully.")
console.info("Set distributed tables successfully.")
}).catch((err) => {
console.info('Failed to set distributed tables, err: ' + err)
})
......@@ -1486,7 +1488,7 @@ promise.then(() => {
obtainDistributedTableName(device: string, table: string, callback: AsyncCallback&lt;string&gt;): void
Obtains the distributed table name for a remote device based on the local table name. The distributed table name is required when the database of a remote device is queried. This API uses an asynchronous callback to return the result.
Obtains the distributed table name for a remote device based on the local table name. This API uses an asynchronous callback to return the result. The distributed table name is required when the database of a remote device is queried.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1504,7 +1506,7 @@ rdbStore.obtainDistributedTableName("12345678abcde", "EMPLOYEE", function (err,
console.info('Failed to obtain DistributedTableName, err: ' + err)
return
}
console.info('obtainDistributedTableName successfully, tableName=.' + tableName)
console.info('Obtained DistributedTableName successfully, tableName=.' + tableName)
})
```
......@@ -1513,7 +1515,7 @@ rdbStore.obtainDistributedTableName("12345678abcde", "EMPLOYEE", function (err,
obtainDistributedTableName(device: string, table: string): Promise&lt;string&gt;
Obtains the distributed table name for a remote device based on the local table name. The distributed table name is required when the database of a remote device is queried. This API uses a promise to return the result.
Obtains the distributed table name for a remote device based on the local table name. This API uses a promise to return the result. The distributed table name is used to query the RDB store of the remote device.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1532,7 +1534,7 @@ Obtains the distributed table name for a remote device based on the local table
```js
let promise = rdbStore.obtainDistributedTableName("12345678abcde", "EMPLOYEE")
promise.then((tableName) => {
console.info('obtainDistributedTableName successfully, tableName=' + tableName)
console.info('Obtained DistributedTableName successfully, tableName=' + tableName)
}).catch((err) => {
console.info('Failed to obtain DistributedTableName, err: ' + err)
})
......@@ -1551,7 +1553,7 @@ Synchronizes data between devices. This API uses an asynchronous callback to ret
| -------- | -------- | -------- | -------- |
| mode | [SyncMode](#syncmode8) | Yes| Data synchronization mode. The value can be **push** or **pull**.|
| predicates | [RdbPredicates](#rdbpredicates) | Yes| **RdbPredicates** object that specifies the data and devices to synchronize.|
| callback | AsyncCallback&lt;Array&lt;[string, number]&gt;&gt; | Yes| Callback invoked to send the synchronization result to the caller. <br>**string** indicates the device ID. <br>**number** indicates the synchronization status of each device. The value **0** indicates a successful synchronization. Other values indicate a synchronization failure. |
| callback | AsyncCallback&lt;Array&lt;[string, number]&gt;&gt; | Yes| Callback invoked to send the synchronization result to the caller. <br>**string** indicates the device ID. <br>**number** indicates the synchronization status of that device. The value **0** indicates a successful synchronization. Other values indicate a synchronization failure. |
**Example**
```js
......@@ -1588,7 +1590,7 @@ Synchronizes data between devices. This API uses a promise to return the result.
| Type| Description|
| -------- | -------- |
| Promise&lt;Array&lt;[string, number]&gt;&gt; | Promise used to return the synchronization result to the caller. <br>**string** indicates the device ID. <br>**number** indicates the synchronization status of each device. The value **0** indicates a successful synchronization. Other values indicate a synchronization failure. |
| Promise&lt;Array&lt;[string, number]&gt;&gt; | Promise used to return the synchronization result to the caller. <br>**string** indicates the device ID. <br>**number** indicates the synchronization status of that device. The value **0** indicates a successful synchronization. Other values indicate a synchronization failure. |
**Example**
```js
......@@ -1639,7 +1641,7 @@ try {
off(event:'dataChange', type: SubscribeType, observer: Callback&lt;Array&lt;string&gt;&gt;): void
Deletes the specified observer of the RDB store. This API uses a callback to return the result.
Unregisters the specified observer of the RDB store. This API uses a callback to return the result.
**System capability**: SystemCapability.DistributedDataManager.RelationalStore.Core
......@@ -1697,7 +1699,7 @@ Defines the types of the key and value in a KV pair.
| Key Type| Value Type|
| -------- | -------- |
| string | [ValueType](#valuetype)\|&nbsp;Uint8Array&nbsp;\|&nbsp;null |
| string | [ValueType](#valuetype)\|&nbsp;Uint8Array&nbsp;\|&nbsp;null |
## SyncMode<sup>8+</sup>
......
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