> No one ever said a number is not natural. just that there is no need to duplicate uniqueness > with a separate number. The whole point is that people are telling you that surrogate keys do not _duplicate_ uniqueness but rather _generate_ it, artificially, and therefore reliably. Today's external uniqueness is ambiguous tomorrow. Karsten -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
