1. 建立存儲過程

比如存儲過程是，刪除15天前的數據：

del_half_month_before_data:

DELIMITER //

BEGIN

DECLARE date_string varchar(100);

DECLARE? date_string2 varchar(100);

DECLARE? date_string3 varchar(100);

SELECT DATE_SUB(CURDATE(), INTERVAL 30 DAY) INTO date_string;

SELECT CONCAT(date_string," 00:00:00") INTO date_string2;

SELECT UNIX_TIMESTAMP(DATE(date_string2)) INTO date_string3;

DELETE FROM `mytable` WHERE `timestamp` < date_string3;

END//

查看剛才創建的存儲過程：show create procedure del_half_month_before_data;

執行剛才創建的存儲過程：call del_half_month_before_data();

2. 檢查mysql定時器是否開 & 啟停定時器 & 啟停事件

查看event是否開啟 : SHOW VARIABLES LIKE '%event_sche%'; 或 show variables like 'event_scheduler';

將事件計劃開啟 :SET GLOBAL event_scheduler = 1;? 或 set global event_scheduler=1;

將事件計劃關閉 :SET GLOBAL event_scheduler = 0; 或 set global event_scheduler=1;

關閉事件任務 :ALTER EVENT eventName ON COMPLETION PRESERVE DISABLE;

開啟事件任務 :ALTER EVENT eventName ON COMPLETION PRESERVE ENABLE;

查看事件任務 : SHOW EVENTS;

3. 定時執行存儲過程，比如每天凌晨1點執行

DROP EVENT IF EXISTS event_del_half_month_before_data;

CREATE EVENT event_del_half_month_before_data on schedule EVERY 1 DAY starts '2017-01-01 01:00:00' do call del_half_month_before_data();

####親測有效，good####

參考：

1. mysql設置定時任務

2. http://blog.csdn.net/s445320/article/details/51897179?_t=t

3. http://www.cnblogs.com/chenpi/p/5137310.html

4. http://blog.sina.com.cn/s/blog_70207ec20101nzf2.html