--- On Tue, 1/29/08, Ivan Sergio Borgonovo <[EMAIL PROTECTED]> wrote:

>> other than defining a function such that I can write:

   SELECT ( a-b ) as pippo
     FROM Yourtable
    WHERE ( a-b ) = 7
UNION ALL
   SELECT ( a*b ) as pippo
     FROM Yourtable
    WHERE ( a*b ) < 12
      AND a > 3
UNION ALL
   SELECT ( a+b ) as pippo
     FROM Yourtable
    WHERE ( a+b ) < 12
      AND a < 3;


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TIP 6: explain analyze is your friend

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