Re: How to have a unique primary key on two tables

["A. Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>]

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
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Andreas Kretschmer
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