Re: Optimize querry sql

am Fri, dem 14.09.2007, um 12:26:00 +0200 mailte Stanislas de Larocque folgendes:
> Hi,
>
> Explain my sql querry :
>
> Limit (cost=1057.15..1057.16 rows=1 width=27)
> -> HashAggregate (cost=1057.15..1057.16 rows=1 width=27)
> -> Nested Loop (cost=0.00..1057.14 rows=1 width=27)
> -> Seq Scan on stat a (cost=0.00..1042.98 rows=1 width=8)
> Filter: (((month)::double precision =
> date_part('month'::text, (now() - '1 mon'::interval))) AND
> ((year)::double precision = date_part('year'::text, (now() - '1
> mon'::interval))))
> -> Index Scan using resaller_pkey on revendeur b
> (cost=0.00..14.15 rows=1 width=23)
> Index Cond: ("outer".idxresaller = b.idxresaller)
> Filter: (asp = 6)
>
> I would optimize "Seq Scan on stat a (cost=0.00..1042.98 rows=1 width=8)"
>
> What is your advice ?

Create indexes on the columns month and year. But, again, you have an
unpractical table-design.

>
> Thank you
>
> Stan
>
>
> 2007/9/14, A. Kretschmer <andreas(dot)kretschmer(at)schollglas(dot)com>:

Please no top-posting.
(answer on top and fullquote below)

Andreas
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