Re: [SQL] More efficient DELETE ... ?

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От The Hermit Hacker
Тема Re: [SQL] More efficient DELETE ... ?
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Msg-id Pine.BSF.4.21.0001221917340.79710-100000@thelab.hub.org
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Ответ на Re: [SQL] More efficient DELETE ... ?  (Tom Lane <tgl@sss.pgh.pa.us>)
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On Sat, 22 Jan 2000, Tom Lane wrote:

> The Hermit Hacker <scrappy@hub.org> writes:
> > This looks painful ...
> 
> > DELETE FROM webhit_referer_raw
> >       WHERE oid IN ( SELECT w.oid
> >                        FROM webhit_referer_raw w, referrer_data r
> >                       WHERE stat_date < 'Jan 17 2000 15:05:00'
> >                         AND w.referrer_url = r.referrer );
> 
> I believe you can do
> 
> DELETE FROM webhit_referer_raw
> WHERE referrer_url = referrer_data.referrer
>       AND referrer_data.stat_date < 'Jan 17 2000 15:05:00';
> 
> (I assume stat_date is in referrer_data, otherwise this'd be easy.)

nope, stat_date is in webhit_referer_raw, but it works like a charm,
thanks :)

Marc G. Fournier                   ICQ#7615664               IRC Nick: Scrappy
Systems Administrator @ hub.org 
primary: scrappy@hub.org           secondary: scrappy@{freebsd|postgresql}.org 



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