DatoDiff til output timer og minutter

Meget enkelt:

CONVERT(TIME,Date2 - Date1)

For eksempel:

Declare @Date2 DATETIME = '2016-01-01 10:01:10.022'
Declare @Date1 DATETIME = '2016-01-01 10:00:00.000'
Select CONVERT(TIME,@Date2 - @Date1) as ElapsedTime

Giver:

ElapsedTime
----------------
00:01:10.0233333

(1 row(s) affected)