MySql如何执行定时任务(定时执行操作)

MysqL属于中小型数据库系统，它的事件调度器Event Scheduler是在MysqL 5.1才开始引入事件调度器是在 MysqL 5.1 中新增的另一个特色功能，可以作为定时任务调度器，取代部分原先只能用操作系统任务调度器才能完成的定时功能。事件调度器是定时触发执行的，在这个角度上也可以称作是临时的触发器。触发器只是针对某个表产生的事件执行一些语句，而事件调度器则是在某一个(间隔)时间执行一些语句。事件是由一个特定的线程来管理的，也就是所谓的事件调度器。

代码：
/*开启event_scheduler，也可以设置为on*/
set global event_scheduler =1;
/*创建简单的任务，每分钟执行一次，从一个表取数据插入到另一个表，也可以定时取，可以参看下面文档，此处为简单例子*/
CREATE EVENT MyEvent
ON SCHEDULE EVERY 1 MINUTE
DO
INSERT INTO list_test (字段1,字段1,字段1) select 字段1,字段1 from 表2 where id = 510;
/*每天固定时间执行*/
CREATE EVENT EVENT_ADD_FOR20_ENOUGH
ON SCHEDULE EVERY 1 DAY
STARTS TIMESTAMP '2009-12-18 02:58:00'/×MysqL注意时区设置，默认非中国时区×/
DO
sql语句

下载：MysqL-Events-CN.rar

再加两段吧

代码：
DELIMITER $$

DROP PROCEDURE IF EXISTS `mystock`.`TEST_KKK`$$

CREATE PROCEDURE `mystock`.`TEST_KKK`()
/*LANGUAGE sql
| [NOT] DETERMINISTIC
| { CONTAINS sql | NO sql | READS sql DATA | MODIFIES sql DATA }
| sql Security { DEFINER | INVOKER }
| COMMENT 'string'*/
BEGIN
DECLARE NUM INTEGER DEFAULT 0;

DECLARE $A INT;

SELECT (20-COUNT(STOCK_CODE)) as number into NUM FROM get_stock_list WHERE FLAG = 0 AND STIME = curdate();

IF NUM>0 THEN

PREPARE STMP FROM 'INSERT INTO get_stock_list (stock_code,stock_name,close,raises,stime) select stock_code,result1,selectd from choice_stock where stock_code not in (select stock_code from get_stock_list where stime = curdate() and flag = 0) and selectd = curdate() and selectd = curdate() order by id limit ?' ;

SET @A = NUM;

EXECUTE STMP USING @A;

END IF;
END$$

DELIMITER ;

代码：
DELIMITER $$

DROP FUNCTION IF EXISTS `mystock`.`FUNCTION_ADD_STOCK_FOR20`$$

CREATE DEFINER=`root`@`localhost` FUNCTION `FUNCTION_ADD_STOCK_FOR20`() RETURNS int(11)
BEGIN
DECLARE NUM,ANOTHER INTEGER;
SELECT COUNT(STOCK_CODE) as number into NUM FROM get_stock_list WHERE FLAG = 0 AND STIME = curdate();
if(NUM<20)
THEN
SET ANOTHER = 20 - NUM;
INSERT INTO get_stock_list (stock_code,selectd from choice_stock where stock_code not in (select stock_code from get_stock_list where stime = curdate() and flag = 0) order by id LIMIT 10;
END IF;
RETURN NUM;
END$$

DELIMITER ;