add

Signed-off-by: Nltdong <donglongtao@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-data-rdb.md

@@ -1765,7 +1765,7 @@ remoteQuery(device: string, table: string, predicates: RdbPredicates, columns: A
 ```js
 let predicates = new data_rdb.RdbPredicates('EMPLOYEE')
 predicates.greaterThan("id", 0)
-let promise = rdbStore.remoteQuery("deviceId", "EMPLOYEE", predicates)
+let promise = rdbStore.remoteQuery("deviceId", "EMPLOYEE", predicates, ["ID", "NAME", "AGE", "SALARY", "CODES"])
 promise.then((resultSet) => {
     console.info("ResultSet column names: " + resultSet.columnNames)
     console.info("ResultSet column count: " + resultSet.columnCount)
@@ -1909,15 +1909,20 @@ beginTransaction():void
 **示例：**
 
 ```js
-rdbStore.beginTransaction()
-const valueBucket = {
+import featureAbility from '@ohos.ability.featureAbility'
+var context = featureAbility.getContext()
+const STORE_CONFIG = { name: "RdbTest.db"}
+data_rdb.getRdbStore(context, STORE_CONFIG, 1, async function (err, rdbStore) {
+    rdbStore.beginTransaction()
+	const valueBucket = {
 		"name": "lisi",
 		"age": 18,
 		"salary": 100.5,
 		"blobType": new Uint8Array([1, 2, 3]),
-}
-await rdbStore.insert("test", valueBucket)
-rdbStore.commit()
+	}
+	await rdbStore.insert("test", valueBucket)
+	rdbStore.commit()
+})
 ```
 
 ### commit<sup>8+</sup>
@@ -1931,16 +1936,20 @@ commit():void
 **示例：**
 
 ```js
-rdbStore.beginTransaction()
-const valueBucket = {
+import featureAbility from '@ohos.ability.featureAbility'
+var context = featureAbility.getContext()
+const STORE_CONFIG = { name: "RdbTest.db"}
+data_rdb.getRdbStore(context, STORE_CONFIG, 1, async function (err, rdbStore) {
+    rdbStore.beginTransaction()
+	const valueBucket = {
 		"name": "lisi",
 		"age": 18,
 		"salary": 100.5,
 		"blobType": new Uint8Array([1, 2, 3]),
-}
-
-await rdbStore.insert("test", valueBucket)
-rdbStore.commit()
+	}
+	await rdbStore.insert("test", valueBucket)
+	rdbStore.commit()
+})
 ```
 
 ### rollBack<sup>8+</sup>
@@ -1954,7 +1963,11 @@ rollBack():void
 **示例：**
 
 ```js
-try {
+import featureAbility from '@ohos.ability.featureAbility'
+var context = featureAbility.getContext()
+const STORE_CONFIG = { name: "RdbTest.db"}
+data_rdb.getRdbStore(context, STORE_CONFIG, 1, async function (err, rdbStore) {
+    try {
 		rdbStore.beginTransaction()
 		const valueBucket = {
 			"id": 1,
@@ -1965,9 +1978,10 @@ try {
 		}
 		await rdbStore.insert("test", valueBucket)
 		rdbStore.commit()
-} catch (e) {
+	} catch (e) {
 		rdbStore.rollBack()
-}
+	}
+})
 ```
 
 ### backup<sup>9+</sup>