我的表中有一个时间戳字段。如何删除超过10分钟的记录?
试过这个:
DELETE FROM locks WHERE time_created < DATE_SUB( CURRENT_TIME(), INTERVAL 10 MINUTE)
没用。我做错了什么?
编辑:我使用了这段代码:
SELECT time_created, CURRENT_TIMESTAMP, TIMESTAMPDIFF( MINUTE, time_created, CURRENT_TIMESTAMP ) FROM locks
但奇怪的是,这也给出了错误的结果
time_created CURRENT_TIMESTAMP TIMESTAMPDIFF( MINUTE, time_created, CURRENT_TIMESTAMP ) 2010-08-01 11:22:29 2010-08-08 12:00:48 10118 2010-08-01 11:23:03 2010-08-08 12:00:48 10117
答案 0 :(得分:129)
如果time_created是一个unix时间戳(int),你应该能够使用这样的东西:
DELETE FROM locks WHERE time_created < (UNIX_TIMESTAMP() - 600);
(600秒= 10分钟 - 显然)
否则(如果time_created是mysql时间戳),你可以试试这个:
DELETE FROM locks WHERE time_created < (NOW() - INTERVAL 10 MINUTE)
答案 1 :(得分:26)
答案恰好在MYSQL manual itself。
"DELETE FROM `table_name` WHERE `time_col` < ADDDATE(NOW(), INTERVAL -1 HOUR)"