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Re: wired behaviour

From: "Paul Dam" <p(dot)dam(at)amyyon(dot)nl>
To: "Lutz Steinborn" <l(dot)steinborn(at)4c-ag(dot)de>,<pgsql-sql(at)postgresql(dot)org>
Subject: Re: wired behaviour
Date: 2008-11-28 14:10:17
Message-ID: (view raw or whole thread)
Lists: pgsql-sql
NULL values?

Met vriendelijke groet,
Paul Dam

Bijsterhuizen 11.58
6546 AS Nijmegen
050 - 311 5686
-----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


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


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