SQL 两次之间的差值（以秒为单位）

Question

SELECT   Warehouses.Name,
         RIGHT(CONVERT(VARCHAR,AirwayBillTrucks.CheckOutTime,100),7) AS CheckOutTime,
         RIGHT(CONVERT(VARCHAR,AirwayBillTrucks.ReturnTime,100),7) AS ReturnTime

那是我的一段代码，CHECKOUTTIME和RETURNTIME曾经是DATETIME DD-DD-YYYY HH-MM-SS 但我将它们转换为 TIME HH-MM-SS tt，这对我来说很好。现在我需要在几秒钟内找出这两列之间的差异，

Answer 1

SELECT DATEDIFF(ss,CheckOutTime,CheckInTime)

SQL 两次之间的差值（以秒为单位）

SQL Difference between two times in seconds

time

sql-server-2012

seconds