要查看当前是否已开启事件调度器，可执行如下SQL： SHOW VARIABLES LIKE 'event_scheduler'; 或 SELECT @@event_scheduler; 或 SHOW PROCESSLIST; 若显示： +-----------------+-------+ | Variable_name   | Value | +-----------------+-------+ | event_scheduler | OFF   | +-----------------+-------+ 则可执行 SET GLOBAL event_scheduler = 1; 或 SET GLOBAL event_scheduler = ON; 来开启，也可以直接在启动命令加上“–event_scheduler=1”，例如： mysqld ... --event_scheduler=1 my.ini or my.cnf 中的 [mysqld] 添加 event_scheduler=ON 创建事件(CREATE EVENT) 先来看一下它的语法： CREATE EVENT [IF NOT EXISTS] event_name ON SCHEDULE schedule [ON COMPLETION [NOT] PRESERVE] [ENABLE | DISABLE] [COMMENT 'comment'] DO sql_statement; schedule: AT TIMESTAMP [+ INTERVAL INTERVAL] | EVERY INTERVAL [STARTS TIMESTAMP] [ENDS TIMESTAMP] INTERVAL: quantity {YEAR | QUARTER | MONTH | DAY | HOUR | MINUTE |             WEEK | SECOND | YEAR_MONTH | DAY_HOUR | DAY_MINUTE |             DAY_SECOND | HOUR_MINUTE | HOUR_SECOND | MINUTE_SECOND} [b]1)首先来看一个简单的例子来演示每秒插入一条记录到数据表[/b] USE test; CREATE TABLE aaa (timeline TIMESTAMP); CREATE EVENT e_test_insert ON SCHEDULE EVERY 1 SECOND DO INSERT INTO test.aaa VALUES (CURRENT_TIMESTAMP); 等待3秒钟后，再执行查询成功。 [b]2) 5天后清空test表： [/b]CREATE EVENT e_test ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 5 DAY DO TRUNCATE TABLE test.aaa; [b]3) 2007年7月20日12点整清空test表：[/b] CREATE EVENT e_test ON SCHEDULE AT TIMESTAMP '2007-07-20 12:00:00' DO TRUNCATE TABLE test.aaa; [b]4) 每天定时清空test表：[/b] CREATE EVENT e_test ON SCHEDULE EVERY 1 DAY DO TRUNCATE TABLE test.aaa; [b]5) 5天后开启每天定时清空test表：[/b] CREATE EVENT e_test ON SCHEDULE EVERY 1 DAY STARTS CURRENT_TIMESTAMP + INTERVAL 5 DAY DO TRUNCATE TABLE test.aaa; [b]6) 每天定时清空test表，5天后停止执行：[/b] CREATE EVENT e_test ON SCHEDULE EVERY 1 DAY ENDS CURRENT_TIMESTAMP + INTERVAL 5 DAY DO TRUNCATE TABLE test.aaa; [b]7) 5天后开启每天定时清空test表，一个月后停止执行：[/b] CREATE EVENT e_test ON SCHEDULE EVERY 1 DAY STARTS CURRENT_TIMESTAMP + INTERVAL 5 DAY ENDS CURRENT_TIMESTAMP + INTERVAL 1 MONTH DO TRUNCATE TABLE test.aaa; [ON COMPLETION [NOT] PRESERVE]可以设置这个事件是执行一次还是持久执行，默认为NOT PRESERVE。 [b]8) 每天定时清空test表(只执行一次，任务完成后就终止该事件)：[/b] CREATE EVENT e_test ON SCHEDULE EVERY 1 DAY ON COMPLETION NOT PRESERVE DO TRUNCATE TABLE test.aaa; [ENABLE | DISABLE]可是设置该事件创建后状态是否开启或关闭，默认为ENABLE。 [COMMENT ‘comment']可以给该事件加上注释。 修改事件(ALTER EVENT) ALTER EVENT event_name [ON SCHEDULE schedule] [RENAME TO new_event_name] [ON COMPLETION [NOT] PRESERVE] [COMMENT 'comment'] [ENABLE | DISABLE] [DO sql_statement] 1) 临时关闭事件 ALTER EVENT e_test DISABLE; 2) 开启事件 ALTER EVENT e_test ENABLE; 3) 将每天清空test表改为5天清空一次： ALTER EVENT e_test ON SCHEDULE EVERY 5 DAY; 删除事件(DROP EVENT) 语法很简单，如下所示： DROP EVENT [IF EXISTS] event_name 例如删除前面创建的e_test事件 DROP EVENT e_test; 当然前提是这个事件存在，否则会产生ERROR 1513 (HY000): Unknown event错误，因此最好加上IF EXISTS DROP EVENT IF EXISTS e_test;