mysql 定时更新表字段列的值状态(存储过程+定时任务)

作者: 大兄弟你这是弱智之相啊
来源: 51数据库
2020-08-27

现在又两个表tcm,doc；
db_count:
id count
1 220
2 300
3 220
4 222
5 240
db_date:
id t_date count
1 2012-09-10 17:04:07 220
2 2012-09-11 15:04:07 224
3 2012-08-20 11:04:07 225
4 2012-02-11 17:04:07 300
5 2012-09-11 10:04:07 500
6 2012-09-12 17:04:07 300

---存储过程变更db_count表count值为0；
DELIMITER //
CREATE PROCEDURE update_count()
BEGIN
DECLARE m date;
DECLARE y CURSOR for select t_date from db_date;
declare CONTINUE HANDLER FOR SQLSTATE '02000' SET k=1;
OPEN y;
FETCH y INTO m;
IF SYSDATE()>m THEN
UPDATE db_date t,db_count g SET g.count=0 WHERE t.id=g.id;
END IF;
CLOSE y;
END //
DELIMITER;

----事件，事件间隔为1秒，进行执行该事件
DELIMITER //
CREATE EVENT my_count
ON SCHEDULE EVERY 1 second do
begin
call update_count();
end //
DELIMITER;

select * from db_count;

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