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## Function to get number of days in month

 Author Message harsha.majety SSC Rookie Group: General Forum Members Points: 29 Visits: 448 Comments posted to this topic are about the item Function to get number of days in month Obs SSC Veteran Group: General Forum Members Points: 249 Visits: 424 How is this not better?Select day(dateadd(mm,DateDiff(mm, -1, getdate()),0) -1) harsha.majety SSC Rookie Group: General Forum Members Points: 29 Visits: 448 Thats clever. Toby Harman Mr or Mrs. 500 Group: General Forum Members Points: 515 Visits: 668 My personal favourite`SELECT DATEPART(dd, DATEADD(dd, DATEPART(dd, DATEADD(mm, 1, @day)) * -1, DATEADD(mm, 1, @day)))` I suspect you would be hard pressed to notice the difference between any of the above, though the Client Statistics suggests the CASE solution is the most efficient Mitesh Oswal SSC Eights! Group: General Forum Members Points: 822 Visits: 653 `DECLARE @dtDate DATETIMESET @dtDate = '2011/02/28'SELECT @dtDate= dateadd(mm,datediff(mm,0,@dtDate),0)SELECT datediff(dd,@dtDate,dateadd(mm,1,@dtDate))` Regards,Mitesh OSwal+918698619998 mpv-1060508 Grasshopper Group: General Forum Members Points: 23 Visits: 97 How about this?RETURN DAY(DATEADD(d,-1,DATEADD(mm,DATEDIFF(m,0,@day)+1,0))) SanDroid UDP Broadcaster Group: General Forum Members Points: 1442 Visits: 1046 Here is some psuedo code for a correct leap year test calculation.if year modulo 400 is 0 then is_leap_yearelse if year modulo 100 is 0 then not_leap_yearelse if year modulo 4 is 0 then is_leap_yearelse not_leap_yearSince this, and other date checking code, is built into the TSQL Date functions I recomend using the examples that have already been posted. Stephen_W_Dodd SSC Eights! Group: General Forum Members Points: 964 Visits: 553 Well, since everyone else likes to do subtractions, I thought I'd contribute an addition only solution :-D (if you don't count DATEDIFF as subtraction :-))`SELECT DATEDIFF(dd,@testdate,(DATEADD(m,1,@testdate)))` Slope Grasshopper Group: General Forum Members Points: 16 Visits: 143 Of course, if you use a calendars table you never have to worry about having to code or validate any date calculations ever again. :-P Sure makes life a lot simpler. Here is how I would get that answer:`SELECT d.DaysInCalendarMonthFROM dbo.dwCalendars dWHERE d.CalendarDate = @SomeDate` Subramaniyan.Manickam SSC-Enthusiastic Group: General Forum Members Points: 121 Visits: 9 nice one..:-)

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