mysql 创建定时任务清理指定表

一、创建定时任务

1、确保MySQL的事件调度器已经开启。可以通过以下SQL命令检查是否开启：

SHOW VARIABLES LIKE 'event_scheduler';

2、如果返回的值为OFF，则可以通过以下命令开启事件调度器：

SET GLOBAL event_scheduler = ON;

3、以下是一个删除your_table表中7天前数据的示例：

CREATE EVENT IF NOT EXISTS event_cleanup_data
ON SCHEDULE EVERY 1 DAY
STARTS CURRENT_TIMESTAMP
DO
  DELETE FROM your_table WHERE your_date_column < DATE_SUB(CURRENT_DATE, INTERVAL 7 DAY);

4、启动事件

ALTER EVENT event_cleanup_data ON
COMPLETION PRESERVE ENABLE;

确保替换your_table和your_date_column为你实际的表名和列名。这样，你就设置了一个定期清理数据的任务

 5、查看事件

SHOW EVENTS;

 

 

二、实例一：删除apb项目中系统日志表中指定90天的数据

CREATE EVENT IF NOT EXISTS event_cleanup_abplog
ON SCHEDULE EVERY 1 DAY
STARTS '2024-08-14 23:00:00'
DO 
BEGIN
DELETE FROM abpauditlogs WHERE executiontime < DATE_SUB(CURRENT_DATE, INTERVAL 90 DAY);
DELETE FROM abpauditlogactions WHERE executiontime < DATE_SUB(CURRENT_DATE, INTERVAL 90 DAY);
DELETE FROM abpentitychanges WHERE changetime < DATE_SUB(CURRENT_DATE, INTERVAL 90 DAY);
END;