Unique primary index?

From: orange_crush_068(at)hotmail(dot)com
To: pgsql-sql(at)postgresql(dot)org
Subject: Unique primary index?
Date: 2005-06-23 12:43:52
Message-ID: 1119530632.181638.4330@g49g2000cwa.googlegroups.com
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What are the major differences between Unique, primary index & just
plain index?

When creating tables I nominate one of these, but not sure what the
difference is?

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