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Date: Wed, 10 Mar 1999 10:00:25 +0200
From: Hannu Krosing <hannu@trust.ee>
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To: vikrant@neuronetin.com
CC: pgsql-interfaces@postgreSQL.org
Subject: Re: [INTERFACES] Retrieve rows 1 by 1
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Vikrant Rathore wrote:
> 
> Please any one can tell me how to update,insert or change a single row
> using libpq interface. The table is not indexed and do not have a
> primary key.

each row has an unique 'object identifier' field called oid (that is 
returned by a single-row insert if you use the psql interface)

so you can use where oid=NNNNN as qualification

Hannu