mysql创建定时任务，每月1号删除上月数据

CREATE DEFINER=`gzy`@`%` PROCEDURE `delLastMonth`()
BEGIN
DECLARE lastmonth int;
SET lastmonth = DATE_FORMAT(date_sub(curdate(),interval 1 MONTH),‘%Y%m‘);
DELETE FROM wysytask.user_sign WHERE `month`=lastmonth;
DELETE FROM wysytask.user_resign WHERE `month`=lastmonth;
END

CREATE DEFINER=`gzy`@`%` EVENT `delLastMonth` ON SCHEDULE EVERY 1 MONTH STARTS ‘2016-08-01 00:00:05‘ ON COMPLETION NOT PRESERVE ENABLE DO CALL delLastMonth