mysql 比較兩個日期的時間差

1 DATEDIFF 函數

 

 這個默認以天為時間差，不能更改時間格式，不是很靈活。

SELECT TIMESTAMPDIFF (HOUR,"2021-04-21 23:23:12","2021-04-25 23:23:12") as d

 

2 TIMESTAMPDIFF 函數

這就可以區分時間級別

天（DAY）、小時（HOUR），分鍾（MINUTE）和秒（SECOND）

 

 

SELECT TIMESTAMPDIFF (DAY,"2021-04-21 23:23:12","2021-04-25 23:23:12") as "天"
SELECT TIMESTAMPDIFF (HOUR,"2021-04-21 23:23:12","2021-04-25 23:23:12") as "時"
SELECT TIMESTAMPDIFF (MINUTE,"2021-04-21 23:23:12","2021-04-25 23:23:12") as "分"
SELECT TIMESTAMPDIFF (SECOND,"2021-04-21 23:23:12","2021-04-25 23:23:12") as "秒"