Re: Optimize querry sql

On Fri, Sep 14, 2007 at 03:02:59PM +0200, Stanislas de Larocque wrote:
> I want to optimize my query sql (execution time : 2665 ms) :
SELECT
b.idxreseller,
sum(a.nbrq),
b.namereseller
from
stat a,
reseller b
where
b.asp=6
and a.idxreseller=b.reseller
and a.month=date_part('month',now() - interval '1 month')
and a.year=date_part('year',now() - interval '1 month')
GROUP BY
b.idxreseller,b.namereseller limit 15;

1. cast all date_parts to int4, like in:
a.month = cast( date_part('month',now() - interval '1 month') as int4)
2. why there is a limit without any order by?
3. change it to get namereseller from subselect, not from join.

depesz

--
quicksil1er: "postgres is excellent, but like any DB it requires a
highly paid DBA. here's my CV!" :)
http://www.depesz.com/ - blog dla ciebie (i moje CV)