Laurent ROCHE wrote:
So I wrote: SELECT 'TRUNCATE TABLE ' UNION
...
ORDER BY relname
And this fails with the following message:
ERROR: column "relname" does not exist

But I don't understand why this does not work: the 2 SELECTs produce a single 
char column so from what I understand that should work ! ? !
If some body can explain I will be grateful.

The "ORDER BY" is attached to the "UNION" not the second subquery. Catches everyone out from time to time.

--
  Richard Huxton
  Archonet Ltd

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