I am trying to insert data from 2 columns in tableB (colX and colY) into the same two columns of tableB, with a join like where clause. Is this possible? For example: INSERT INTO tableA (colX, colY) (SELECT colX, colY FROM tableB WHERE tableA.blockname = tableB.block_name AND tableA.timestamp = tableB.timestamp) ; -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general