diff --git a/zh-cn/application-dev/reference/apis/js-apis-application-DataShareExtensionAbility.md b/zh-cn/application-dev/reference/apis/js-apis-application-DataShareExtensionAbility.md
index 9e3ad40655294d5752668edb8023848b303c46e2..49c1719a5f408bc5181043d85962ae83233ffb9b 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-application-DataShareExtensionAbility.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-application-DataShareExtensionAbility.md
@@ -40,21 +40,19 @@ let TBL_NAME = "TBL00";
 let DDL_TBL_CREATE = "CREATE TABLE IF NOT EXISTS "
 + TBL_NAME
 + " (id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER, phoneNumber DOUBLE, isStudent BOOLEAN, Binary BINARY)";
+let rdbStore;
 
-onCreate(want, callback) {
-    console.log('DataShareExtAbility onCreate, want:' + want.abilityName);
-    console.log('DataShareExtAbility onCreate, this.context:' + this.context);
+onCreate(want: Want, callback: AsyncCallback<void>) {
     rdb.getRdbStore(this.context, {
         name: DB_NAME
     }, 1, function (err, data) {
-        console.log('getRdbStore fail, error message : ' + err);
         console.log('getRdbStore done, data : ' + data);
-        let rdbStore = data;
+        rdbStore = data;
         rdbStore.executeSql(DDL_TBL_CREATE, [], function (err) {
-            console.log('executeSql fail, error message : ' + err);
+            console.log('executeSql done, error message : ' + err);
         });
+        callback();
     });
-    callback();
 }
 ```
 
@@ -64,7 +62,7 @@ insert?(uri: string, valueBucket: ValuesBucket, callback: AsyncCallback<numbe
 
 在数据库插入时回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -77,11 +75,7 @@ insert?(uri: string, valueBucket: ValuesBucket, callback: AsyncCallback<numbe
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.rdb';
-let TBL_NAME = "TBL00";
-let rdbStore;
-
-insert(uri, value, callback) {
+insert(uri: string, valueBucket: ValuesBucket, callback: AsyncCallback<number>) {
     if (value == null) {
         console.info('invalid valueBuckets');
         return;
@@ -101,7 +95,7 @@ update?(uri: string, predicates: DataSharePredicates, valueBucket: ValuesBucket,
 
 在数据库更新时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -115,11 +109,7 @@ update?(uri: string, predicates: DataSharePredicates, valueBucket: ValuesBucket,
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.rdb';
-let TBL_NAME = "TBL00";
-let rdbStore;
-
-update(uri, predicates, value, callback) {
+update(uri: string, predicates: DataSharePredicates, valueBucket: ValuesBucket, callback: AsyncCallback<number>) {
     if (predicates == null || predicates == undefined) {
         return;
     }
@@ -137,7 +127,7 @@ query?(uri: string, predicates: DataSharePredicates, columns: Array<string&gt
 
 在查询数据库时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -151,11 +141,7 @@ query?(uri: string, predicates: DataSharePredicates, columns: Array<string&gt
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.rdb';
-let TBL_NAME = "TBL00";
-let rdbStore;
-
-query(uri, predicates, columns, callback) {
+query(uri: string, predicates: DataSharePredicates, columns: Array<string>, callback: AsyncCallback<Object>) {
     if (predicates == null || predicates == undefined) {
         return;
     }
@@ -176,7 +162,7 @@ delete?(uri: string, predicates: DataSharePredicates, callback: AsyncCallback&lt
 
 在删除数据库记录时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -189,11 +175,7 @@ delete?(uri: string, predicates: DataSharePredicates, callback: AsyncCallback&lt
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.rdb';
-let TBL_NAME = "TBL00";
-let rdbStore;
-
-delete(uri, predicates, callback) {
+delete(uri: string, predicates: DataSharePredicates, callback: AsyncCallback<number>) {
     if (predicates == null || predicates == undefined) {
         return;
     }
@@ -211,7 +193,7 @@ BatchInsert?(uri: string, valueBuckets: Array<ValuesBucket>, callback: Asy
 
 在数据库批量插入时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -224,11 +206,7 @@ BatchInsert?(uri: string, valueBuckets: Array<ValuesBucket>, callback: Asy
 **示例：**
 
 ```ts
-import rdb from '@ohos.data.rdb';
-let TBL_NAME = "TBL00";
-let rdbStore;
-
-batchInsert(uri: string, valueBuckets, callback) {
+batchInsert(uri: string, valueBuckets: Array<ValuesBucket>, callback: AsyncCallback<number>) {
     if (valueBuckets == null || valueBuckets.length == undefined) {
         console.info('invalid valueBuckets');
         return;
@@ -250,7 +228,7 @@ getType?(uri: string, callback: AsyncCallback<string>): void
 
 获取给定URI对应的MIME类型时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -262,8 +240,8 @@ getType?(uri: string, callback: AsyncCallback<string>): void
 **示例：**
 
 ```ts
-getType(uri: string, callback) {
-    let err;
+getType(uri: string, callback: AsyncCallback<string>) {
+    let err = {"code":0};
     let ret = "image";
     callback(err, ret);
 }
@@ -275,7 +253,7 @@ getFileTypes?(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Ar
 
 获取支持文件的MIME类型时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -288,8 +266,8 @@ getFileTypes?(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Ar
 **示例：**
 
 ```ts
-getFileTypes(uri: string, mimeTypeFilter: string,callback) {
-    let err;
+getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array<string>>) {
+    let err = {"code":0};
     let ret = new Array("type01", "type02", "type03");
     callback(err, ret);
 }
@@ -301,7 +279,7 @@ normalizeUri?(uri: string, callback: AsyncCallback<string>): void
 
 用户给定的URI转换为服务端使用的URI时回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -313,8 +291,8 @@ normalizeUri?(uri: string, callback: AsyncCallback<string>): void
 **示例：**
 
 ```ts
-normalizeUri(uri: string, callback) {
-    let err;
+normalizeUri(uri: string, callback: AsyncCallback<string>) {
+    let err = {"code":0};
     let ret = "normalize+" + uri;
     callback(err, ret);
 }
@@ -326,7 +304,7 @@ denormalizeUri?(uri: string, callback: AsyncCallback<string>): void
 
 服务端使用的URI转换为用户传入的初始URI时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -338,8 +316,8 @@ denormalizeUri?(uri: string, callback: AsyncCallback<string>): void
 **示例：**
 
 ```ts
-denormalizeUri(uri: string, callback) {
-    let err;
+denormalizeUri(uri: string, callback: AsyncCallback<string>) {
+    let err = {"code":0};
 	let ret = "denormalize+" + uri;
 	callback(err, ret);
 }
@@ -351,7 +329,7 @@ openFile?(uri: string, mode: string, callback: AsyncCallback<number>): voi
 
 在打开文件时服务端回调此接口，该方法可以选择性重写。
 
-**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider。
+**系统能力：**  SystemCapability.DistributedDataManager.DataShare.Provider
 
 **参数：**
 
@@ -364,9 +342,9 @@ openFile?(uri: string, mode: string, callback: AsyncCallback<number>): voi
 **示例：**
 
 ```ts
-openFile(uri: string, mode, callback) {
-    let err;
+openFile(uri: string, mode: string, callback: AsyncCallback<number>) {
+    let err = {"code":0};
     let fd = 0;
     callback(err,fd);
 }
-```
+```
\ No newline at end of file
diff --git a/zh-cn/application-dev/reference/apis/js-apis-data-dataShare.md b/zh-cn/application-dev/reference/apis/js-apis-data-dataShare.md
index aad8ed3f2724d6882633f51ee111314390b8a16c..125b7cf10eb979b819cc379a2643f9e17302b9d1 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-data-dataShare.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-data-dataShare.md
@@ -36,13 +36,14 @@ createDataShareHelper(context: Context, uri: string, callback: AsyncCallback<
 ```ts
 import dataShare from '@ohos.data.dataShare'
 
-let dseUri = ("datashare:///com.samples.datasharetest.DataShare");
-dataShare.createDataShareHelper(this.context, dseUri, (err, data) => {
+let uri = ("datashare:///com.samples.datasharetest.DataShare");
+let dataShareHelper;
+dataShare.createDataShareHelper(this.context, uri, (err, data) => {
     if (err != undefined) {
         console.info("createDataShareHelper failed, error message : " + err);
     } else {
         console.info("createDataShareHelper succeed, data : " + data);
-        let dataShareHelper = data;
+        dataShareHelper = data;
     }
 });
 ```
@@ -73,10 +74,11 @@ createDataShareHelper(context: Context, uri: string): Promise<DataShareHelper
 ```ts
 import dataShare from '@ohos.data.dataShare'
 
-let dseUri = ("datashare:///com.samples.datasharetest.DataShare");
-dataShare.createDataShareHelper(this.context, dseUri).then((data) => {
+let uri = ("datashare:///com.samples.datasharetest.DataShare");
+let dataShareHelper;
+dataShare.createDataShareHelper(this.context, uri).then((data) => {
     console.info("createDataShareHelper succeed, data : " + data);
-    let dataShareHelper = data;
+    dataShareHelper = data;
 }).catch((err) => {
 	console.info("createDataShareHelper failed, error message : " + err); 
 })
@@ -84,7 +86,7 @@ dataShare.createDataShareHelper(this.context, dseUri).then((data) => {
 
 ## DataShareHelper
 
-DataShare管理工具实例，可使用此实例访问或管理服务端的数据。在调用DataShareHelper提供的方法前，需要先通过[createDataShareHelper](#datashare.createdatasharehelper)构建一个实例。
+DataShare管理工具实例，可使用此实例访问或管理服务端的数据。在调用DataShareHelper提供的方法前，需要先通过[createDataShareHelper](#datasharecreatedatasharehelper)构建一个实例。
 
 ### openFile
 
@@ -105,8 +107,6 @@ openFile(uri: string, mode: string, callback: AsyncCallback<number>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.openFile(uri, "rwt", (err, data) => {
     if (err != undefined) {
         console.info("openFile failed, error message : " + err);
@@ -141,8 +141,6 @@ openFile(uri: string, mode: string): Promise<number>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.openFile(uri, "rwt").then((data) => {
     console.info("openFile succeed, data : " + data);
     let fd = data;
@@ -170,13 +168,10 @@ on(type: 'dataChange', uri: string, callback: AsyncCallback<void>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
-dataShareHelper.on("dataChange", uri, onCallback);
-
-export function onCallback() {
+function onCallback() {
     console.info("**** Observer on callback ****");
 }
+dataShareHelper.on("dataChange", uri, onCallback);
 ```
 
 ### off('dataChange')
@@ -198,13 +193,10 @@ off(type: 'dataChange', uri: string, callback?: AsyncCallback<void>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
-dataShareHelper.off("dataChange", uri, offCallback);
-
-export function offCallback() {
+function offCallback() {
     console.info("**** Observer off callback ****");
 }
+dataShareHelper.off("dataChange", uri, offCallback);
 ```
 
 ### notifyChange
@@ -225,8 +217,6 @@ notifyChange(uri: string, callback: AsyncCallback<void>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.notifyChange(uri, () => {
     console.log("***** notifyChange *****");
 });
@@ -255,17 +245,6 @@ notifyChange(uri: string): Promise<void>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
-dataShare.createDataShareHelper(this.context, uri, (err, data) => {
-    if (err != undefined) {
-        console.info("createDataShareHelper failed, error message : " + err);
-    } else {
-        console.info("createDataShareHelper succeed, data : " + data);
-        dataShareHelper = data;
-    }
-});
-
 dataShareHelper.notifyChange(uri);
 ```
 
@@ -287,15 +266,13 @@ getType(uri: string, callback: AsyncCallback<string>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.getType(uri, (err, data)=>{
     if (err != undefined) {
         console.log("getType failed, error message : " + err);
     }else{
         console.log("getType succeed, data : " + data);
         let result = data;
-    }         
+    }
 });
 ```
 
@@ -322,8 +299,6 @@ getType(uri: string): Promise<string>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.getType(uri).then((data) => {
     console.log("getType succeed, data : " + data);
 }).catch((err) => {
@@ -350,8 +325,6 @@ getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Arr
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let mimeTypeFilter = "image/*";
 dataShareHelper.getFileTypes(uri, mimeTypeFilter, (err,data) => {
     if (err != undefined) {
@@ -362,8 +335,6 @@ dataShareHelper.getFileTypes(uri, mimeTypeFilter, (err,data) => {
 });
 ```
 
-
-
 ### getFileTypes
 
 getFileTypes(uri: string, mimeTypeFilter: string): Promise<Array<string>>
@@ -388,8 +359,6 @@ getFileTypes(uri: string, mimeTypeFilter: string): Promise<Array<string&gt
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let mimeTypeFilter = "image/*";
 dataShareHelper.getFileTypes(uri, mimeTypeFilter).then((data) => {
 	console.log("getFileTypes succeed, data : " + data);
@@ -416,8 +385,6 @@ normalizeUri(uri: string, callback: AsyncCallback<string>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.normalizeUri(uri, (err, data) => {
     if (err != undefined) {
         console.log("normalizeUri failed, error message : " + err);
@@ -450,8 +417,6 @@ normalizeUri(uri: string): Promise<string>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.normalizeUri(uri).then((data) => {
     console.log("normalizeUri = " + data);
 }).catch((err) => {
@@ -477,8 +442,6 @@ denormalizeUri(uri: string, callback: AsyncCallback<string>): void
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.denormalizeUri(uri, (err, data) => {
     if (err != undefined) {
         console.log("denormalizeUri failed, error message : " + err);
@@ -511,8 +474,6 @@ denormalizeUri(uri: string): Promise<string>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 dataShareHelper.denormalizeUri(uri).then((data) => {
     console.log("denormalizeUri = " + data);
 }).catch((err) => {
@@ -539,13 +500,10 @@ insert(uri: string, value: ValuesBucket, callback: AsyncCallback<number>):
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 const valueBucket = {
     "name": "rose",
     "age": 22,
     "salary": 200.5,
-    "blobType": u8,
 }
 dataShareHelper.insert(uri, valueBucket, (err, data) => {
     if (err != undefined) {
@@ -580,13 +538,10 @@ insert(uri: string, value: ValuesBucket): Promise<number>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 const valueBucket = {
     "name": "rose1",
     "age": 221,
     "salary": 20.5,
-    "blobType": u8,
 }
 dataShareHelper.insert(uri, valueBucket).then((data) => {
     console.log("insert succeed, data : " + data);
@@ -614,11 +569,9 @@ batchInsert(uri: string, values: Array<ValuesBucket>, callback: AsyncCallb
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
-let vbs = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": u8,},
-                     {"name": "roe12", "age": 21, "salary": 20.5, "blobType": u8,},
-                     {"name": "roe13", "age": 21, "salary": 20.5, "blobType": u8,})
+let vbs = new Array({"name": "roe11", "age": 21, "salary": 20.5,},
+                     {"name": "roe12", "age": 21, "salary": 20.5,},
+                     {"name": "roe13", "age": 21, "salary": 20.5,})
 dataShareHelper.batchInsert(uri, vbs, (err, data) => {
     if (err != undefined) {
         console.log("batchInsert failed, error message : " + err);
@@ -652,11 +605,9 @@ batchInsert(uri: string, values: Array<ValuesBucket>): Promise<number&g
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
-let vbs = new Array({"name": "roe11", "age": 21, "salary": 20.5, "blobType": u8,},
-                     {"name": "roe12", "age": 21, "salary": 20.5, "blobType": u8,},
-                     {"name": "roe13", "age": 21, "salary": 20.5, "blobType": u8,})
+let vbs = new Array({"name": "roe11", "age": 21, "salary": 20.5,},
+                     {"name": "roe12", "age": 21, "salary": 20.5,},
+                     {"name": "roe13", "age": 21, "salary": 20.5,})
 dataShareHelper.batchInsert(uri, vbs).then((data) => {
     console.log("batchInsert succeed, data : " + data);
 }).catch((err) => {
@@ -683,8 +634,6 @@ delete(uri: string, predicates: DataSharePredicates, callback: AsyncCallback<
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let da = new dataShare.DataSharePredicates();
 da.equalTo("name", "ZhangSan");
 dataShareHelper.delete(uri, da, (err, data) => {
@@ -720,8 +669,6 @@ delete(uri: string, predicates: DataSharePredicates): Promise<number>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let da = new dataShare.DataSharePredicates();
 da.equalTo("name", "ZhangSan");
 dataShareHelper.delete(uri, da).then((data) => {
@@ -751,15 +698,13 @@ update(uri: string, predicates: DataSharePredicates, value: ValuesBucket, callba
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let da = new dataShare.DataSharePredicates();
 da.equalTo("name", "ZhangSan");
 const va = {
     "name": "roe1",
     "age": 21,
     "salary": 20.5,
-    "blobType": u8,
+   
 }
 dataShareHelper.update(uri, da, va, (err, data) => {
     if (err != undefined) {
@@ -795,15 +740,13 @@ update(uri: string, predicates: DataSharePredicates, value: ValuesBucket): Promi
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let da = new dataShare.DataSharePredicates();
 da.equalTo("name", "ZhangSan");
 const va = {
     "name": "roe1",
     "age": 21,
     "salary": 20.5,
-    "blobType": u8,
+   
 }
 dataShareHelper.update(uri, da, va).then((data) => {
     console.log("update succeed, data : " + data);
@@ -832,8 +775,6 @@ query(uri: string, predicates: DataSharePredicates, columns: Array<string>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let columns = ["*"];
 let da = new dataShare.DataSharePredicates();
 da.equalTo("name", "ZhangSan");
@@ -841,13 +782,11 @@ dataShareHelper.query(uri, da, columns, (err, data) => {
     if (err != undefined) {
         console.log("query failed, error message : " + err);
     }else{
-        console.log("query succeed, data : " + data);
+        console.log("query succeed, ret : " + data.rowCount);
     }
 });
 ```
 
-
-
 ### query
 
 query(uri: string, predicates: DataSharePredicates, columns: Array<string>): Promise<DataShareResultSet>
@@ -873,13 +812,11 @@ query(uri: string, predicates: DataSharePredicates, columns: Array<string>
 **示例：**
 
 ```ts
-let dataShareHelper;
-let uri = ("datashare:///com.samples.datasharetest.DataShare");
 let columns = ["*"];
 let da = new dataShare.DataSharePredicates();
 da.equalTo("name", "ZhangSan");
 dataShareHelper.query(uri, da, columns).then((data) => {
-    console.log("query succeed, data : " + data);
+    console.log("query succeed, ret : " + data.rowCount);
 }).catch((err) => {
     console.log("query failed, error message : " + err);
 });