From: Tomasz Myrta <jasiek@klaster.net>
To: Huub <v.niekerk@freeler.nl>
Cc: pgsql-sql@postgresql.org
Subject: Re: primary keys
Date: Thu, 07 Nov 2002 15:49:06 +0100
Message-ID: <3DCA7D62.2070806@klaster.net> (raw)
References: <aqb8b8$1k8v$1@news.hub.org>
Uz.ytkownik Huub napisa?:
> 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.
Dependent on what you need:
1) you can create primary key based on 2 fields
2) you can't create 2 primary keys - but you can create primary key on
first field and create unique index on second one.
Tomasz Myrta
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To: pgsql-sql@postgresql.org
Cc: jasiek@klaster.net, v.niekerk@freeler.nl
Subject: Re: primary keys
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