A way to extract from a DateTime value data without seconds

Question

I have an sql DateTime (ms sql server) and want to extract the same date without the seconds: e.g. 2011-11-22 12:14:58.000 to become: 2011-11

Answer 1

If there is no milliseconds, than

DECLARE @dt datetime2 = '2011-11-22 12:14:58.000';
DECLARE @goalDt datetime2 = DATEADD(second,-DATEPART(second,@dt), @dt);

To remove a milliseconds part, add

SET @goalDt = DATEADD(millisecond,-DATEPART(millisecond,@goalDt ), goalDt dt);