Re: small table, huge table, and a join = slow and tough query. cake inside!

edfialk wrote:
> SELECT small.fips, small.geom, small.name, SUM(huge.value) from small
> JOIN huge on huge.fips = small.fips WHERE (SUM(huge.value)) > 500 AND
> huge.pollutant='co';
>
> wonder if that makes sense. Obviously, can't have an aggregate in
> where clause, so I've tried a couple WHERE (SELECT) kind of things,
> nothing working out too well.
>
> So first, if anyone has any idea on the best way I can do a WHERE
> (sum(huge.value) > 500)
> or...
> any ideas on how I could speed up the query, I would be so extremely
> grateful.

SELECT small.fips, small.geom, small.name, SUM(huge.value)
from small JOIN huge on huge.fips = small.fips
WHERE
huge.pollutant='co';
GROUP BY small.fips, small.geom, small.name
HAVING SUM(huge.value) > 500;

Regards,
Stephen Denne
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