From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-sql@postgresql.org
Subject: Re: Optimize querry sql
Date: Fri, 14 Sep 2007 10:49:52 +0200
Message-ID: <20070914084952.GB7443@a-kretschmer.de> (raw)
In-Reply-To: <bc40d0a30709140131u3f23c6e1h17b8bf1f96235a91@mail.gmail.com>
References: <bc40d0a30709140131u3f23c6e1h17b8bf1f96235a91@mail.gmail.com>
am Fri, dem 14.09.2007, um 10:31:39 +0200 mailte Stanislas de Larocque folgendes:
> Hi,
>
> I want to optimize my qerry sql (execution time : 2448 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;
Show us the output from EXLAIN ANALYSE <your query>.
My guess: you need at least an index in reseller.asp. Why do you have
columns such a.month and a.year? se a regular DATE or TIMESTAMPTZ field
instead and an index on this.
And use CURRENT_DATE instead now().
Andreas
--
Andreas Kretschmer
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To: pgsql-sql@postgresql.org
Cc: andreas.kretschmer@schollglas.com
Subject: Re: Optimize querry sql
In-Reply-To: <20070914084952.GB7443@a-kretschmer.de>
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