On Sat, 14 Nov 2009 11:58:42 -0800, Peter Haworth
<[email protected]> wrote:
>I'm trying to get a SELECT statement in the following general form to
>work:
>
>SELECT CASE WHEN <condition> THEN <calculation> ELSE <calculation>
>END AS CalcA, sum(CalcA) AS CalcATotal ....
>
>I get an error "no such column" referring to CalcA when used in the
>sum function. I'm trying to get total of all the values of CalcA
>across all the selected rows. Is there a way to do this?
You can't combine the two, because sum() is an aggregate
function.
There is a way to show the CalcA values together with their
sum though:
SELECT 'detail' AS Descr,
CASE
WHEN <condition> THEN <calculation>
ELSE <calculation>
END AS CalcA;
UNION
SELECT 'total' AS Descr sum(
CASE
WHEN <condition> THEN <calculation>
ELSE <calculation>
END
) AS CalcA;
(untested)
--
( Kees Nuyt
)
c[_]
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