Read the docs on "connectby" function provided by "tablefunc" contrib module. Igor
________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gibson Chimhamhiwa Sent: Friday, July 25, 2008 7:43 AM To: pgsql-admin@postgresql.org Subject: [ADMIN] Prent-Child relationships in SQL Hi All, I have a simple table below and I want to be able to write a SQL select query that returns the grouping_ids until I get no more children. The parent_grouping_id column is the parent to the grouping_id child column. Can somebody please advise me how I can do this in postgreSQL. CREATE TABLE grouping ( grouping_id int4 NOT NULL, version int4, parent_grouping_id int4, topic_topic_id int4, CONSTRAINT grouping_pkey PRIMARY KEY (grouping_id), CONSTRAINT fk1e2e9d036852722d FOREIGN KEY (topic_topic_id) REFERENCES topic (topic_id) MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION, CONSTRAINT fk1e2e9d03a1bfbfe FOREIGN KEY (topic_topic_id) REFERENCES topic (topic_id) MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION, CONSTRAINT fk1e2e9d03cdaf7222 FOREIGN KEY (parent_grouping_id) REFERENCES grouping (grouping_id) MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION ) WITHOUT OIDS; ALTER TABLE grouping OWNER TO napdba; Thanks In Advance.
