-- =============================================
-- Author:		<Author,,Name>
-- Create date: <Create Date, ,>
-- Description:	<Description, ,>
-- =============================================
CREATE FUNCTION [dbo].[date_monthend]
(
	@date date
)
RETURNS date
AS
BEGIN
	DECLARE @monthend date = CASE WHEN @date is null THEN NULL ELSE DATEADD(DAY, -1, DATEADD(MONTH, 1, DATEFROMPARTS(YEAR(@date), MONTH(@date),1))) END;

	return @monthend;
END