docs/TD-22199

remove old timestamp in sql example

docs/en/07-develop/03-insert-data/01-sql-writing.mdx

@@ -30,25 +30,31 @@ Application programs can execute `INSERT` statement through connectors to insert
 The below SQL statement is used to insert one row into table "d1001".
 
 ```sql
-INSERT INTO d1001 VALUES (1538548685000, 10.3, 219, 0.31);
+INSERT INTO d1001 VALUES (ts1, 10.3, 219, 0.31);
 ```
 
+`ts1` is Unix timestamp, the timestamps which is larger than the difference between current time and KEEP in config is only allowed. For further detial, refer to [TDengine SQL insert timestamp section](/taos-sql/insert).
+
 ### Insert Multiple Rows
 
 Multiple rows can be inserted in a single SQL statement. The example below inserts 2 rows into table "d1001".
 
 ```sql
-INSERT INTO d1001 VALUES (1538548684000, 10.2, 220, 0.23) (1538548696650, 10.3, 218, 0.25);
+INSERT INTO d1001 VALUES (ts2, 10.2, 220, 0.23) (ts2, 10.3, 218, 0.25);
 ```
 
+`ts1` and `ts2` is Unix timestamp, the timestamps which is larger than the difference between current time and KEEP in config is only allowed. For further detial, refer to [TDengine SQL insert timestamp section](/taos-sql/insert).
+
 ### Insert into Multiple Tables
 
 Data can be inserted into multiple tables in the same SQL statement. The example below inserts 2 rows into table "d1001" and 1 row into table "d1002".
 
 ```sql
-INSERT INTO d1001 VALUES (1538548685000, 10.3, 219, 0.31) (1538548695000, 12.6, 218, 0.33) d1002 VALUES (1538548696800, 12.3, 221, 0.31);
+INSERT INTO d1001 VALUES (ts1, 10.3, 219, 0.31) (ts2, 12.6, 218, 0.33) d1002 VALUES (ts3, 12.3, 221, 0.31);
 ```
 
+`ts1`, `ts2` and `ts3` is Unix timestamp, the timestamps which is larger than the difference between current time and KEEP in config is only allowed. For further detial, refer to [TDengine SQL insert timestamp section](/taos-sql/insert).
+
 For more details about `INSERT` please refer to [INSERT](/taos-sql/insert).
 
 :::info

docs/zh/07-develop/03-insert-data/01-sql-writing.mdx

@@ -30,25 +30,31 @@ import PhpStmt from "./_php_stmt.mdx";
 下面这条 INSERT 就将一条记录写入到表 d1001 中：
 
 ```sql
-INSERT INTO d1001 VALUES (1538548685000, 10.3, 219, 0.31);
+INSERT INTO d1001 VALUES (ts1, 10.3, 219, 0.31);
 ```
 
+这里的`ts1`为Unix时间戳(Unix timestamp)，允许插入的最老记录的时间戳，是相对于当前服务器时间，减去配置的 KEEP 值。时间戳详情规则参考 [TDengine SQL数据写入 关于时间戳一节](/taos-sql/insert)
+
 ### 一次写入多条
 
 TDengine 支持一次写入多条记录，比如下面这条命令就将两条记录写入到表 d1001 中：
 
 ```sql
-INSERT INTO d1001 VALUES (1538548684000, 10.2, 220, 0.23) (1538548696650, 10.3, 218, 0.25);
+INSERT INTO d1001 VALUES (ts1, 10.2, 220, 0.23) (ts2, 10.3, 218, 0.25);
 ```
 
+这里的`ts1`和`ts2`为Unix时间戳(Unix timestamp)，允许插入的最老记录的时间戳，是相对于当前服务器时间，减去配置的 KEEP 值。时间戳详情规则参考 [TDengine SQL数据写入 关于时间戳一节](/taos-sql/insert)
+
 ### 一次写入多表
 
 TDengine 也支持一次向多个表写入数据，比如下面这条命令就向 d1001 写入两条记录，向 d1002 写入一条记录：
 
 ```sql
-INSERT INTO d1001 VALUES (1538548685000, 10.3, 219, 0.31) (1538548695000, 12.6, 218, 0.33) d1002 VALUES (1538548696800, 12.3, 221, 0.31);
+INSERT INTO d1001 VALUES (ts1, 10.3, 219, 0.31) (ts2, 12.6, 218, 0.33) d1002 VALUES (ts3, 12.3, 221, 0.31);
 ```
 
+这里的`ts1`、`ts2`和`ts3`为Unix时间戳(Unix timestamp)，允许插入的最老记录的时间戳，是相对于当前服务器时间，减去配置的 KEEP 值。时间戳详情规则参考 [TDengine SQL数据写入 关于时间戳一节](/taos-sql/insert)
+
 详细的 SQL INSERT 语法规则参考 [TDengine SQL 的数据写入](/taos-sql/insert)。
 
 :::info