Re: How to have a unique primary key on two tables - Mailing list pgsql-sql

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