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

DECLARE @TheDate DATETIME
SET @TheDate = '2011-11-22 12:14:58.000'

DATEADD(mi, DATEDIFF(mi, 0, @TheDate), 0)

In queries

/* ...all records in that minute; index-friendly expression */ 
WHERE TheDate BETWEEN DATEADD(mi, DATEDIFF(mi, 0, @TheDate), 0) 
                  AND DATEADD(mi, DATEDIFF(mi, 0, @TheDate) + 1, 0)