Question

I am trying to create a countdown timer. I have created_at value, life_time value and current_time.

I want to sum created_at and life_time and subtract current_time.

created_at : 2017-05-22 04:49:54

life_time : 500 (minutes)

and i can find current time like this. (12/10/2002 13:37:25)

But all variables have different format. How can i

created_at + life_time - current_time = I WANT (dd/mm/yyy hh:mm:ss)

created_at defined as a datetime and lifetime defined as an integer and minutes in mysql.

Answer 1

将时间单位添加到mysql使用Date_add函数，如下所示：

SELECT DATE_ADD("2017-12-28", INTERVAL 10 MINUTE);

此链接为此提供了很好的示例

时间也可以为负，这将有助于您创建倒计时