Question

I have This function

ALTER FUNCTION [General].[GetWeekEnding] 
(
@Date DATETIME
)
RETURNS DATETIME
AS
BEGIN
-- Return the result of the function
RETURN (DATEADD(day, -1 - (DATEPART(dw, @Date) + @@DATEFIRST - 2) % 7, @Date) + 7)
END

I need to also set the time to 00:00:00.000 as well as finding the week ending of a provided date any thoughts?

Answer 1

I use a UDF for adding time components to dates e.g.

CREATE FUNCTION [dbo].[DateTimeAdd] 
( 
      @datepart         date, 
      @timepart         time 
) 
RETURNS datetime2 
AS 
BEGIN 
      RETURN DATEADD(dd, DATEDIFF(dd, 0, @datepart), CAST(@timepart AS datetime2)); 
END

Then in your case you can use it like this:

SELECT dbo.DateTimeAdd(DATEADD (D, -1 * DatePart (DW, GetDate()) + 7, GetDate()), DATEADD(hh, 0, CAST(DATEADD(DAY, DATEDIFF(DAY, -1, GETDATE()), -1)  AS TIME)))