wired behaviour - Mailing list pgsql-sql

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