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

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