[EMAIL PROTECTED] (cnliou) writes:
> I want to GROUP BY and ORDER BY on the result of UNION similar to the
> following (wrong) SQL:
> (SELECT c11 AS c1,SUM(c12) AS c2 FROM table1
> UNION
> SELECT c21 AS c1,SUM(c22) AS c2 FROM table2
> )
> GROUP BY c1
> ORDER BY c2;
Correct is
SELECT * FROM
(SELECT c11 AS c1,SUM(c12) AS c2 FROM table1
UNION
SELECT c21 AS c1,SUM(c22) AS c2 FROM table2
) ss
GROUP BY c1
ORDER BY c2;
regards, tom lane
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