NULL values?
Met vriendelijke groet,
Paul Dam
Informatieanalist
Amyyon
Bijsterhuizen 11.58
6546 AS Nijmegen
050 - 311 5686
www.amyyon.nl
-----Oorspronkelijk bericht-----
Van: pgsql-sql-owner@postgresql.org
[mailto:pgsql-sql-owner@postgresql.org] Namens Lutz Steinborn
Verzonden: vrijdag 28 november 2008 14:52
Aan: pgsql-sql@postgresql.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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