Re: select first occurrence of a table

=?iso-8859-1?q?Erik=20Ronstr=F6m?= <kvarken@yahoo.com> writes:
> If the table has OIDs (which is the default), you can use the OID as a
> unique identifier for a row.

You could also use CTID in the same way; this works on all tables.
It does require that no one else is trying to update the same row at
about the same time, though.

            regards, tom lane