On 31/10/2010 16:37, Paul wrote:
Please, help me. Why the condition SELECT 5 NOT IN (NULL) returns NULL, but not FALSE (as I thought)?
Because NULL basically means "don't know" - so you don't know whether 5 is there or not.
Ray. -- Raymond O'Donnell :: Galway :: Ireland rod@xxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
