如果设置了特定值，如何在一小时后在表上创建触发器以更新字段

Question

My database stores the parking status information 1 The status field has three values (0 for empty, 1 for occupied and 2 for waiting) If the parking status remains 2 for 1 hour I want to set it to 0 and set the username field to null.

Is there any way to do it with triggers.

Answer 1

You probably looking to create a Event like

CREATE EVENT myevent
ON SCHEDULE EVERY HOUR 
DO
UPDATE mytable 
SET status = 0, username = null
where status = 2;