From: terry@greatgulfhomes.com
To: "'Huub'" <v.niekerk@freeler.nl>, <pgsql-sql@postgresql.org>
Subject: Re: primary keys
Date: Thu, 7 Nov 2002 08:54:24 -0500
Message-ID: <010c01c28665$2ef19b80$2766f30a@development.greatgulfhomes.com>
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Importance: Normal

A table can only have ONE primary key.  It can have additional indexes with
a UNIQUE restriction, thereby forcing the second field to be as good as a
primary key.

That is probably what you are looking for, however, you can also in PG Admin
II select multiple fields as being the member of the primary key.


Terry Fielder
Network Engineer
Great Gulf Homes / Ashton Woods Homes
terry@greatgulfhomes.com


> -----Original Message-----
> From: pgsql-sql-owner@postgresql.org
> [mailto:pgsql-sql-owner@postgresql.org]On Behalf Of Huub
> Sent: Wednesday, November 06, 2002 9:19 AM
> To: pgsql-sql@postgresql.org
> Subject: [SQL] primary keys
>
>
> Hi,
>
> I want to create a table which has 2 columns, and both
> columns have to
> be primary key (or: together they are the primary key). How can I do
> this using SQL? Using pgAdminII for Postgres7.2.2 on RH8.
>
> Thanks
>
> Huub
>
>
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