Convert HH:MM:SS string to number of minutes

Question

I have the below query.

select cast(dateadd(minute, datediff(minute, TimeIn, TimeOut), 0) as time(0) )

I get the results from two columns in th

Answer 1

SELECT DATEDIFF(minute,CAST('00:00' AS TIME), CAST('02:47' AS TIME)) AS difference

Gives you:

| DIFFERENCE |
--------------
|        167 |

Answer 2

For SQL Server (works for 2005 too):

select Datediff(mi,convert(datetime,'00:00:00',108), convert(datetime,'02:47:00',108))