时间:2021-07-01 10:21:17 帮助过:8人阅读
存储过程实例:
CREATE PROCEDURE backUpSms() BEGIN DECLARE tname varchar(64); set @tname = CONCAT('sms_accpet',DATE_FORMAT(NOW(),'%Y%m')); set @rname = CONCAT('create table ',@tname,' select * from sms_accpet'); PREPARE create_table from @rname; EXECUTE create_table; delete from sms_accpet;
CREATE EVENT EVENT_SMS ON SCHEDULE EVERY 1 MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 1 HOUR) ON COMPLETION PRESERVE ENABLE DO CALL backUpSms();
存储过程:
http://blog.csdn.net/youngqj/article/details/6936632
http://blog.csdn.net/sun886/article/details/7992935
定时器:
http://www.cnblogs.com/gaizai/archive/2012/12/24/2831315.html
http://lobert.iteye.com/blog/1953827
1.复制表结构及数据到新表 CREATE TABLE 新表 SELECT * FROM 旧表 2.只复制表结构到新表 CREATE TABLE 新表 SELECT * FROM 旧表 WHERE 1=2 即:让WHERE条件不成立. 方法二:(低版本的mysql不支持,mysql4.0.25 不支持,mysql5已经支持了) CREATE TABLE 新表 LIKE 旧表 3.复制旧表的数据到新表(假设两个表结构一样) INSERT INTO 新表 SELECT * FROM 旧表 4.复制旧表的数据到新表(假设两个表结构不一样) INSERT INTO 新表(字段1,字段2,…….) SELECT 字段1,字段2,…… FROM 旧表
每天凌晨三点执行 create event event_call_defer on schedule every 1 day starts date_add(date(curdate() + 1),interval 3 hour) on completion preserve enable do begin call test.warn(); end 每个月的一号凌晨1 点执行 CREATE EVENT EVENT2 ON SCHEDULE EVERY 1 MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 1 HOUR) ON COMPLETION PRESERVE ENABLE DO BEGIN CALL STAT(); END 每个季度一号的凌晨2点执行 CREATE EVENT TOTAL_SEASON_EVENT ON SCHEDULE EVERY 1 QUARTER STARTS DATE_ADD(DATE_ADD(DATE( CONCAT(YEAR(CURDATE()),'-',ELT(QUARTER(CURDATE()),1,4,7,10),'-',1)),INTERVAL 1 QUARTER),INTERVAL 2 HOUR) ON COMPLETION PRESERVE ENABLE DO BEGIN CALL SEASON_STAT(); END 每年1月1号凌晨四点执行 CREATE EVENT TOTAL_YEAR_EVENT ON SCHEDULE EVERY 1 YEAR STARTS DATE_ADD(DATE(CONCAT(YEAR(CURDATE()) + 1,'-',1,'-',1)),INTERVAL 4 HOUR) ON COMPLETION PRESERVE ENABLE DO BEGIN CALL YEAR_STAT(); END