--method one
Declare @MONTH INT, @Year Int
SELECT @Month = 6, @Year = 2004
Select Datepart (DD, DateAdd (M, 1, Cast (Str (@Month) '/ 01 /' STR (@Year) AS
DateTime)) - 1)
--Method Two
Declare @date datetime
Set @date = getdate ()
SELECT CAST
- First Day of Next Month
Dateadd (Month, Datediff (Month, 0, @ Date) 1,0)
-
- First Day of current Month
Datead (Month, Datediff (Month, 0, @ Date), 0)
As int)
- Method three
You can also write a UDF to implement:
Create function fn_numofdaysinmon (@date datetime)
Returns Int
AS
Begin
Declare @begmonth datetime, @ endmonth datetime, @ days int
Select @ begmonth = dateadd (Month, Datediff (Month, 0, @ Date), 0)
Select @ endmonth = dateadd (DD, -Datepart (DD, @ Date), DateAdd (mm, 1, @ Date))
Select @ days = datediff (DD, @ Begmonth, @ endmonth) 1
Return @days
end
