Truncate date to only hour / minute

Question

How do i trunc the date in sql server 2008 like this :

I have 2012-01-02 12:04:11.443 and I want only to select 2012-01-02 12:00:00.000 and

Answer 1

I'm using something like this:

DATEADD(hour,DATEDIFF(hour,'2000-01-01 00:00',[timestamp]),'2000-01-01 00:00')

You can use this formula to truncate to other levels, ie minutes:

DATEADD(minutes,DATEDIFF(minutes,'2000-01-01 00:00',[timestamp]),'2000-01-01 00:00')

You must remember that if you are truncating to seconds level, the maximum difference between the base date and [timestamp] is 68 years.