参考文章:http://www.cnblogs.com/c840136/articles/2388512.html
首先:确认事件机制开没开
show VARIABLES LIKE 'event_scheduler';
没开则SET GLOBAL event_scheduler = 1
也可以单独暂定或者启动一个事件 ALTER EVENT [event_name] ENABLE;
例子:#macc_sta_virtualip表定时删除
DROP EVENT
IF EXISTS macc_sta_virtualip_delete;
CREATE EVENT macc_sta_virtualip_delete ON SCHEDULE EVERY 1 DAY STARTS DATE_ADD(DATE_ADD(CURDATE(), INTERVAL 1 DAY), INTERVAL 3 HOUR) DO
DELETE FROM macc_sta_virtualip WHERE
TIME_TO_SEC(TIMEDIFF(CURRENT_TIMESTAMP(), update_time)) >= 86400;