如何获取SQL中的日期之间经过的分钟数

Question

I need to get the total elapsed minutes between two date in sql,what I try gives me an error

Msg 257, Level 16, State 3, Line 3
Implicit conversion from data type datetime to int is not allowed. Use the CONVERT function to run this query

Here is my code: Endtime = 2014-08-01 15:00:00 and StartTime = 2014-07-31 10:00:00

SELECT (EndTime - StartTime) * 1440
FROM DowntimeEvent
WHERE EventId = 1;

24 * 60 = 1440
24 hours in a day * 60 minutes in an hour

Answer 1

Use SQL's DATEDIFF() function:

SELECT DATEDIFF(MINUTE,StartTime,EndTime)
FROM DowntimeEvent
WHERE EventId = 1;

Answer 2

DATEDIFF is what you're looking for. eg:

select DATEDIFF(minute, StartTime, EndTime) from DowntimeEvent where EventId = 1