CREATE FUNCTION dbo.f_SKX_IsDataCross      (        @fromDate DATETIME ,        @toDate DATETIME ,        @startDate DATETIME ,        @endDate DATETIME      )  RETURNS INT    AS   BEGIN      DECLARE @ret INT      IF ( DATEDIFF(DAY, @fromDate, @endDate) >= 0 AND DATEDIFF(DAY, @endDate, @toDate) >= 0 )           SET @ret = 1      IF ( DATEDIFF(DAY, @startDate, @toDate) >= 0 AND DATEDIFF(DAY, @toDate, @endDate) >= 0 )           SET @ret = 1      IF ( @ret IS NULL )           SET @ret = 0      RETURN @ret  END