Re: wired behaviour

From: Lutz Steinborn <l(dot)steinborn(at)4c-ag(dot)de>
To: pgsql-sql(at)postgresql(dot)org
Subject: Re: wired behaviour
Date: 2008-11-28 14:22:01
Message-ID: 20081128152201.05a88f4c.l.steinborn@4c-ag.de
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Hello Paul,

thanks for the quick answer.

> NULL values?
Jepp, thats it.
I've supposed this but can't believe it. So NULL is something out of this
dimension :-)

Kindly regards
Lutz

>
> Met vriendelijke groet,
>
> Paul Dam
> Informatieanalist
>
>
>
>
> Amyyon
> Bijsterhuizen 11.58
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> -----Oorspronkelijk bericht-----
> Van: pgsql-sql-owner(at)postgresql(dot)org
> [mailto:pgsql-sql-owner(at)postgresql(dot)org] Namens Lutz Steinborn
> Verzonden: vrijdag 28 november 2008 14:52
> Aan: pgsql-sql(at)postgresql(dot)org
> Onderwerp: [SQL] wired behaviour
>
> Hello,
>
> I have an problem understanding a simple query:
>
> For example I have the following:
> select count(*) from foo;
> gives me 1000
>
> select count(*) from foo where bar = 'Mr Spock';
> gives me 5
>
> select count(*) from foo where NOT bar = 'Mr Spock';
> gives me 857
>
> Why I'm not getting 955 for the last query ?
>
>
> Any idea ?
>
> Kindly regards
>
>
> Lutz
>
> --
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--
Lutz Steinborn
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