I have following table: CREATE TABLE "sys"."tapomay3" ( "id"     INTEGER, "val"    VARCHAR(20), "valnum" INTEGER       NOT NULL, CONSTRAINT "pk3" PRIMARY KEY ("valnum"), CONSTRAINT "tapomay3_id_val_unique" UNIQUE ("id", "val") ); I need to get the list of column names that are part of any unique key. sql>select o.name from keys k, objects o where k.id in (select id from keys where table_id = (select id from tables where name='tapomay3') and name like '%unique') and o.id = k.id; +---------+ | name    | +=========+ | id      | | val     | +---------+ select o.name from keys k, objects o where k.id in (select id from keys where table_id = (select id from tables where name='tapomay3') and name like '%unique') and o.id = k.id Is this the right approach? Thanks and Regards, Tapomay. _______________________________________________ users-list mailing list users-list@monetdb.org http://mail.monetdb.org/mailman/listinfo/users-list