system maintained keys

From: "Stefan Lindner" <lindner(at)visionet(dot)de>
To: pgsql-sql(at)postgresql(dot)org
Subject: system maintained keys
Date: 2001-10-15 15:43:40
Message-ID: 9qf06v$20bh$1@news.tht.net
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Is there any way to get system maintained keys from postgres? e.g. to
have a table with a primary key column (varchar or int) and let postgres
chose the next unique value for this column?

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