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Enviado para você por ribafs através do Google Reader: Hubert Lubaczewski: NULLs vs. NOT IN() via ::Planet PostgreSQL:: em 13/08/08 Friend of mine found something that he thought looked like a bug in Pg. Very simple query: select * from table where id not in (select field from other_table) was not returning any rows, despite the fact that there definitely are some “ids” that are not in other_table.field. Why is that? First, let’s build a test case: CREATE TABLE objects [...] Coisas que você pode fazer a partir daqui: - Inscrever-se no ::Planet PostgreSQL:: usando o Google Reader - Comece a usar o Google Reader para manter-se facilmente atualizado com todos os seus sites favoritos
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