設置列值等於columnB減去columnA

Question

我希望將MySql列“時間”更新為列“ End_Time” 減去列“ Start_Time”

注意：End_Time和Start_Time為DATETIME格式。

謝謝

Answer 1

試試這個方法

SELECT SEC_TO_TIME(TIMESTAMPDIFF(second,Start_Time,End_Time)) --include sec
or
SELECT SEC_TO_TIME(TIMESTAMPDIFF(minute,Start_Time,End_Time)*60) --diff in minute

eg

SELECT SEC_TO_TIME(TIMESTAMPDIFF(minute,'2016-05-04 10:00:00','2016-05-04 11:29:00')*60)

在這里TIMESTAMPDIFF(minute將返回以分鍾為單位的差異，並將其乘以* 60以獲得秒，並使用SEC_TO_TIME將秒轉換為時間。

Answer 2

在MySQL中使用Datediff函數

看到這里DATEDIFF

Answer 3

您可以使用TIMESTAMPDIFF函數。

SELECT TIMESTAMPDIFF(minute, '2015-06-01 13:13:55', '2015-06-03 10:15:20')

SELECT TIMESTAMPDIFF(second, '2015-06-01 13:13:55', '2015-06-03 10:15:20')

SELECT TIMESTAMPDIFF(hour, '2015-06-01 13:13:55', '2015-06-03 10:15:20')

Answer 4

update table 
set Time = (select 
            to_timestamp(End_Time,'yyyy-mm-dd hh24:mi:ss') - to_timestamp(Start_Time,'yyyy-mm-dd hh24:mi:ss')
            );