mysql - 每天特定时间的 MySQL 事件调度程序

Question

这是我的查询

CREATE EVENT
RESET ON SCHEDULE AT TIMESTAMP DO
UPDATE `ndic`.`students`
SET `status` = '0';  

如何每天下午 1 点将状态更新为“0”。

我可以用什么代替TIMESTAMP？

Answer 1

这对你的工作来说可能为时已晚，但我是这样做的。我希望每天凌晨 1 点运行一些东西——我相信这与你正在做的事情相似。这是我的做法：

CREATE EVENT event_name
  ON SCHEDULE
    EVERY 1 DAY
    STARTS (TIMESTAMP(CURRENT_DATE) + INTERVAL 1 DAY + INTERVAL 1 HOUR)
  DO
    # Your awesome query

Answer 2

CREATE EVENT的文档非常好，但需要一段时间才能正确完成。

你有两个问题，第一，让事件重复，第二，让它在每天 13:00 运行。

此示例创建一个重复事件。

CREATE EVENT e_hourly
    ON SCHEDULE
      EVERY 1 HOUR
    COMMENT 'Clears out sessions table each hour.'
    DO
      DELETE FROM site_activity.sessions;

在命令行 MySQL 客户端中，您可以：

SHOW EVENTS;

这列出了每个事件及其元数据，例如它应该只运行一次还是重复出现。

第二个问题：将重复事件指向特定的日程项目。

通过尝试不同的表达方式，我们可以想出类似的东西：

CREATE EVENT IF NOT EXISTS `session_cleaner_event`
ON SCHEDULE
  EVERY 13 DAY_HOUR
  COMMENT 'Clean up sessions at 13:00 daily!'
  DO
    DELETE FROM site_activity.sessions;

Answer 3

My use case is similar, except that I want a log cleanup event to run at 2am every night. As I said in the comment above, the DAY_HOUR doesn't work for me. In my case I don't really mind potentially missing the first day (and, given it is to run at 2am then 2am tomorrow is almost always the next 2am) so I use:

CREATE EVENT applog_clean_event
ON SCHEDULE 
    EVERY 1 DAY
    STARTS str_to_date( date_format(now(), '%Y%m%d 0200'), '%Y%m%d %H%i' ) + INTERVAL 1 DAY
COMMENT 'Test'
DO 

Answer 4

尝试这个

CREATE EVENT event1
ON SCHEDULE EVERY '1' DAY
STARTS '2012-04-17 13:00:00' -- should be in the future
DO
-- your statements
END

Answer 5

DROP EVENT IF EXISTS xxxEVENTxxx;
CREATE EVENT xxxEVENTxxx
  ON SCHEDULE
    EVERY 1 DAY
    STARTS (TIMESTAMP(CURRENT_DATE) + INTERVAL 1 DAY + INTERVAL 1 HOUR)
  DO
    --process;

¡重要！->

SET GLOBAL event_scheduler = ON;

Answer 6

CREATE EVENT test_event_03
ON SCHEDULE EVERY 1 MINUTE
STARTS CURRENT_TIMESTAMP
ENDS CURRENT_TIMESTAMP + INTERVAL 1 HOUR
DO
   INSERT INTO messages(message,created_at)
   VALUES('Test MySQL recurring Event',NOW());