mysql实现定时执行sql语句

mysql实现定时执行SQL语句需要用到Event

1.检查event事件是否开启

    show variables like '%sche%';

    


    1)如果Value值为OFF，则需要开启。需要超级权限

        set global event_scheduler=1;

2.创建存储过程

    CREATE PROCEDURE insert_monitor () INSERT INTO `equipment_information` ( device_id, device_name, temperature, humidity, electric_current, voltage, date_time        )        VALUES ( 1, '主机', FLOOR(20 +(RAND() * 26)), FLOOR(1 +(RAND() * 100)), FLOOR(1 +(RAND() * 10)), FLOOR(1 +(RAND() * 10)), SYSDATE() );

3.创建定时任务

    create event if not exists e_monitor
    on schedule every 5 second  --设置5秒执行一次
    on completion preserve

    do call insert_monitor(); --执行insert_monitor()存储过程

4.关闭事件任务

    alter event e_monitor ON

    COMPLETION PRESERVE DISABLE;

5.开启事件任务

    alter event e_monitor ON

    COMPLETION PRESERVE ENABLE;