mysql定时删除过期数据记录的简单方法

1. 连接登录MySQL后，先查看MySQL是否开启了事件功能：

命令：show variables like '%sc%';

发现event_sheduler是OFF关闭的;

2. 打开event_scheuler:

临时开启(mysql服务重启后之后失效)

SET GLOBAL event_scheduler = ON; SET GLOBAL event_scheduler = 1; — 0代表关闭

在my.cnf中的[mysqld]部分添加如下内容，然后重启mysql(mysql重启命令：service mysqld restart)

event_scheduler=ON

create event e_delete_wififlows on schedule every 5 second do delete from wififlows where timestamp < (CURRENT_TIMESTAMP() + INTERVAL -2 MINUTE);

drop event if exists e_delete_wififlows;

4. 开启事件：

alter event e_del_wififlows on completion preserve enable;

alter event e_del_wififlowa on completion preserve disable;

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