Hello I need many tables of type "id" and "name", see below: CREATE TABLE id_names ( id smallint CONSTRAINT the_id PRIMARY KEY NOT NULL, name text CONSTRAINT the_name UNIQUE ) WITH OIDS; therefore I created these tables with the "LIKE" operator, see below: CREATE TABLE like_id_1( LIKE id_names INCLUDING DEFAULTS ) WITH OIDS; CREATE TABLE like_id_2 ( LIKE id_names INCLUDING DEFAULTS ) WITH OIDS; CREATE TABLE like_id_3 .... Next I can't create a table with some column reference to any of the last two tables, see below: database=# CREATE TABLE ref_1 ( id_1 smallint CONSTRAINT the_id_1 REFERENCES like_id_1 (id) ); ERROR: there is no unique constraint matching given keys for referenced table "like_id_1" Obviously if I use "id_names" instead of "like_id_1" every think is fine but my idea is not create thousands of almost same tables with the table name's like the only one difference. Then I thought to use the operator "LIKE", but you see, there are a problem. Any Idea about what must I do ?? Thank you, Gustavo |