MySQL中如何删除时间戳超过5分钟的记录
mysql> create table DemoTable1851
(
DueDate datetime
);
Query OK, 0 rows affected (0.00 sec)使用Insert命令在表中插入一些记录：
mysql> insert into DemoTable1851 values('2019-12-03 21:30:35');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1851 values('2019-12-03 21:45:00');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1851 values('2019-12-03 21:34:00');
Query OK, 1 row affected (0.00 sec)使用select语句显示表中的所有记录
mysql> select * from DemoTable1851;
这将产生以下输出
+---------------------+ | DueDate | +---------------------+ | 2019-12-03 21:30:35 | | 2019-12-03 21:45:00 | | 2019-12-03 21:34:00 | +---------------------+ 3 rows in set (0.00 sec)
mysql> select now(); +---------------------+ | now() | +---------------------+ | 2019-12-03 21:38:46 | +---------------------+ 1 row in set (0.00 sec)
下面是删除时间戳超过5分钟的记录的查询
mysql> delete from DemoTable1851 where DueDate < (NOW() - INTERVAL 5 MINUTE); Query OK, 2 rows affected (0.00 sec)
使用select语句显示表中的所有记录
mysql> select * from DemoTable1851;
+---------------------+ | DueDate | +---------------------+ | 2019-12-03 21:45:00 | +---------------------+ 1 row in set (0.00 sec)