Return business week for a given date

>>Script Language and Platform: SQL Server 2000 User-Defined Functions
This user-defined function will return the Monday before or the Sunday after any given date. I use this function primarily to categorize service activities for our business; our weekly calendar runs from Monday to Sunday.

Usage is simple:


SELECT dbo.udfBusinessWeek(GetDate(), ‘B’)

to return the Monday of this week, and

SELECT dbo.udfBusinessWeek(GetDate(), ‘E’)

to return the following Sunday.

Author: Stuart R Ainsworth


CREATE FUNCTION udfBusinessWeek (@Date as smalldatetime, @BeginOrEnd as
char(1))
RETURNS smalldatetime AS
/*This function will return the first or last day of the business week,
using the framework of Monday – Sunday */

BEGIN
DECLARE @Output smalldatetime

IF @BeginOrEnd = ‘B’
BEGIN
SET @Output = CASE WHEN DATEPART(dw, @DATE) = 1
THEN DATEADD(d, -6, @DATE)
ELSE DATEADD(d, -DATEPART(dw, @DATE)+2,
@DATE)END
END
ELSE IF @BeginOrEnd = ‘E’
BEGIN
SET @Output = CASE WHEN DATEPART(dw, @DATE) = 1
THEN @DATE
ELSE DATEADD(d, -DATEPART(dw, @DATE)+8,
@DATE)END
END

RETURN(CONVERT(smalldatetime, CAST(@Output as char(11))))
END

GO



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