Yes, PG allows compound or composite keys for primary keys. Igor -----Original Message----- From: pgsql-admin-owner@xxxxxxxxxxxxxx [mailto:pgsql-admin-owner@xxxxxxxxxxxxxx] On Behalf Of Carol Walter Sent: Wednesday, September 19, 2007 10:37 AM To: pgsql-admin@xxxxxxxxxxxxxx Subject: Primary key Hello, Does postgres allow compound or composite keys for primary keys? I thought I read someplace that it didn't. Now, I can't find a reference to it. Carol ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings