!8274 【轻量级 PR】：update zh-cn/application-dev/database/database-relational-guidelines.md.

Merge pull request !8274 from 葛亚芳/N/A

zh-cn/application-dev/database/database-relational-guidelines.md

@@ -164,7 +164,7 @@
    import data_rdb from '@ohos.data.rdb'
    
    const CREATE_TABLE_TEST = "CREATE TABLE IF NOT EXISTS test (" + "id INTEGER PRIMARY KEY AUTOINCREMENT, " + "name TEXT NOT NULL, " + "age INTEGER, " + "salary REAL, " + "blobType BLOB)";
-   const STORE_CONFIG = {name: "rdbstore.db",}
+   const STORE_CONFIG = {name: "rdbstore.db"}
    data_rdb.getRdbStore(STORE_CONFIG, 1, function (err, rdbStore) {
        rdbStore.executeSql(CREATE_TABLE_TEST )
        console.info('create table done.')
@@ -179,7 +179,7 @@
 
    ```js
    var u8 = new Uint8Array([1, 2, 3])
-   const valueBucket = {"name": "Tom", "age": 18, "salary": 100.5, "blobType": u8,}
+   const valueBucket = {"name": "Tom", "age": 18, "salary": 100.5, "blobType": u8}
    let insertPromise = rdbStore.insert("test", valueBucket)
    ```