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

Date and time needs carefully and not being converted as TEXT.

My personal solution:

    CREATE FUNCTION [dbo].[fnDateTimeTruncated]
(
    @datetime DATETIME
)
RETURNS DATETIME
AS
BEGIN
    RETURN DATETIMEFROMPARTS ( year(@datetime), month(@datetime), day(@datetime), DATEPART(hh,@datetime), DATEPART(mi,@datetime), 0, 0)
END

Edited:

Regarding http://blog.waynesheffield.com/wayne/archive/2012/03/truncate-a-date-time-to-different-part/, DateAdd has a better performance. Thanks to t-clausen.dk

Answer 2

SELECT DATEADD(MINUTE, DATEDIFF(MINUTE, 0, yourcolumn), 0) FROM yourtable

This will be effective, if you don't want a slow conversion between datatypes.