Some Licensing FAQ

Get Number of Days in a Month Function


CREATE FUNCTION [dbo].[ufn_GetDaysInMonth] ( @pDate DATETIME )
RETURNS INT
AS
BEGIN
RETURN CASE WHEN MONTH(@pDate) IN (1, 3, 5, 7, 8, 10, 12) THEN 31
WHEN MONTH(@pDate) IN (4, 6, 9, 11) THEN 30
ELSE CASE WHEN (YEAR(@pDate) % 4 = 0 AND
YEAR(@pDate) % 100 != 0) OR
(YEAR(@pDate) % 400 = 0)
THEN 29
ELSE 28
END
END
END
GO



Method 2


CREATE FUNCTION [dbo].[ufn_GetDaysInMonth] ( @pDate DATETIME )
RETURNS INT
AS
BEGIN
RETURN CASE WHEN MONTH(@pDate) IN (1, 3, 5, 7, 8, 10, 12) THEN 31
WHEN MONTH(@pDate) IN (4, 6, 9, 11) THEN 30
ELSE [dbo].[ufn_IsLeapYear] ( @pDate ) + 28
END
END
GO


Method 3







CREATE FUNCTION [dbo].[ufn_GetDaysInMonth] ( @pDate DATETIME )
RETURNS INT
AS
BEGIN
SET @pDate = CONVERT(VARCHAR(10), @pDate, 101)
SET @pDate = @pDate - DAY(@pDate) + 1
RETURN DATEDIFF(DD, @pDate, DATEADD(MM, 1, @pDate))
END
GO




No Of Days in an Year

CREATE FUNCTION [dbo].[ufn_GetDaysInYear] ( @pDate DATETIME )
RETURNS INT
AS
BEGIN
DECLARE @IsLeapYear BIT
SET @IsLeapYear = 0
IF (YEAR( @pDate ) % 4 = 0 AND YEAR( @pDate ) % 100 != 0) OR
YEAR( @pDate ) % 400 = 0
SET @IsLeapYear = 1
RETURN 365 + @IsLeapYear
END
GO