Let me know if you find that it breaks with anything....(I know it won't be correct if you specify an invalid @Itr, just want to know if the math doesn't work for any dates checked)
2017-12-29
1,084 reads
Get date for iteration of a DOW
CREATE FUNCTION GetDateForDOW ( --DECLARE @YearSMALLINT= 2018 , @MonthTINYINT= 11 -- 1-12 , @DOW TINYINT= 4 -- Sunday = 0, Monday = 1, ect... , @ItrTINYINT= 4 -- iteration of specified DOW ) RETURNS DATE AS BEGIN DECLARE@1stDATE = CONVERT(VARCHAR(2),@Month)+'/1/' + CONVERT(VARCHAR(4),@Year); DECLARE@RtrnDtDATE = DATEADD(DAY,((CEILING((CONVERT(DECIMAL(8, 2),17) % DATEPART(dw, @1st)) / 10) * 7) + (@DOW+((@Itr-2)*7))+1) - DATEPART(dw, @1st), @1st); --SELECT @RtrnDt RETURN@RtrnDt; END GO
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