Re: LIMIT within UNION?

>>>>> "Andrew" == Andrew Perrin <clists(at)perrin(dot)socsci(dot)unc(dot)edu> writes:

Andrew> What I've done is to write a script that counts the number
Andrew> of eligible exposure candidates:

Andrew> SELECT count(*) FROM participants WHERE <eligibility>
Andrew> AND typenr=1

Andrew> Then subtract that number (currently 28) from 200 to get
Andrew> 172 control participants. Then the problem starts.

[...]

Andrew> returns ERROR: parser: parse error at or near "ORDER"

Can you do this via a subselect:

SELECT * FROM
( SELECT ... FROM participants
WHERE typenr=1 AND <eligibility>
UNION
SELECT ... FROM participants
WHERE typenr=2 LIMIT 172 )
ORDER BY zip;

roland
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