Mysql事件的建立和使用

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1、查看事件是否開啟
SHOW VARIABLES LIKE ‘event_scheduler‘;

2、開啟事件
SET GLOBAL event_scheduler = ON;

3、建立事件
DELIMITER $$

-- SET GLOBAL event_scheduler = ON$$ -- required for event to execute but not create

CREATE/*[DEFINER = { user | CURRENT_USER }]*/EVENT `db_name`.`everyday_refresh`

ON SCHEDULE EVERY 1 DAY STARTS ‘2014-07-22 11:00:00‘ ON COMPLETION PRESERVE DISABLE ON SLAVE

DO
BEGIN
UPDATE `tb_times` SET remanent_times = GREATEST(`remanent_times`,new_times);
END$$

DELIMITER ;