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SQL Scripts & Samples

Posted Feb 25, 2003

UDF to round minutes to quarter hour

By DatabaseJournal.com Staff



>>Script Language and Platform: SQL Server 2000 User-Defined Functions
At our consulting firm, we record time in minutes, and we round those minutes up to the next quarter hour; for reporting purposes, we bill according to hours used. This function requires an input of minutes used, and will return the results rounded to the next quarter hour (e.g.):

SELECT dbo.udfRoundQtRHr(61)   returns 1.25
SELECT dbo.udfRoundQtRHr(59)   returns 1.00

Author: Stuart R Ainsworth

Script:

CREATE  FUNCTION udfRoundQtrHr (@Minutes as numeric(10,6)) 
RETURNS numeric(6,2) AS

BEGIN
   DECLARE @Output int
   DECLARE @ModOutput numeric(10,6)

   SET @Output =  CEILING(@Minutes) -- raises the value of the minutes 
   		to the next whole minute 	

   SET @ModOutput = @Output % 60
   SET @ModOutput = CASE WHEN @ModOutput BETWEEN 1 AND 15 THEN 0.25
			WHEN @ModOutput BETWEEN 16 AND 30 THEN 0.50
			WHEN @ModOutput BETWEEN 31 AND 45 THEN 0.75
			WHEN @ModOutput BETWEEN 46 AND 59 THEN 1.00
			ELSE 0
		    END
 

   RETURN(@Output/60 + @ModOutput)


END



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