Difference between two UDF

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June 26th, 2009, 12:15 AM

sillyrabbit

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Location: Sacramento

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Difference between two UDF

I'm executing a simple select statement with two UDFs - allocated_hours and actual_hours. I also need to calculate the difference between the two UDF in a separate column. However, I would rather not have to execute each UDF a second time to get the delta between the two UDFs, unless the experts out there feel the overhead will be nominal.

Is there a different way besides the following:

SELECT column1 as Col1, allocated_hours(column1) as [Allocated Hours], actual_hours(column1) as [Actual Hours], allocated_hours(column1) - actual_hours(column1) as [Delta]
FROM blah

Thanks in advance

June 26th, 2009, 03:25 AM

r937

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of course there is

Code:

SELECT Col1
     , [Allocated Hours]
     , [Actual Hours]
     , [Allocated Hours] - [Actual Hours] AS [Delta]
  FROM (
       SELECT column1 AS Col1
            , allocated_hours(column1) AS [Allocated Hours]
            , actual_hours(column1) AS [Actual Hours]
         FROM blah
       ) AS foo

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June 26th, 2009, 10:12 AM

sillyrabbit

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Location: Sacramento

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Thanks!

Awesome! I'll try it out as soon as I can.

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