You can use a combination of DATEADD() and DATEDIFF() functions to perform what you are trying to do. Basically the code below calls the DATEDIFF function to return the time portion as the number of milliseconds, then calls the DATEADD function to add the number of millisec's to the date. This assumes that you always want to add the time portion from @settime to the @newdate variable and the time portion of @newdate is always 00:00:00.

DECLARE @settime DATETIME,
        @newdate DATETIME,
        @result  DATETIME

SELECT @settime = '1/1/1900 9:10:48 AM',
       @newdate = '7/13/2005'


SELECT @result = DATEADD(ms,DATEDIFF(ms,'01/01/1900',@settime),@newdate)
PRINT @result

Kurt

>DATEPART selects the part of the date to extract, as does Day, Month, and Year. Is there a way to update a datetime field so that the original is not changed except for the part that needs to be? For example, if @settime = 1/1/1900 9:10:48 AM and I wanted to update it to 7/13/2005 9:10:48 AM, is there a set-based command that would do that?
>
>All help is appreciated.