am Thu, dem 22.11.2007, um 12:01:59 +0100 mailte Daniel bodom_lx Graziotin folgendes: > Hi everybody, > I need to have a primary key which has to be unique on two tables. > E.g.: > > CREATE TABLE first > ( > id serial NOT NULL, > testo text, > ) > > CREATE TABLE second > ( > id serial NOT NULL, > testo text, > ) > > When I insert some text on "first", I would like first.id = second.id > + 1, and vice versa. > A sort of primary key in common for both tables. > > Any hints?
Yes. Create a SEQUENCE and use nextval(sequence) as primary key on both tables. Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
