help with uniq index

From: Lorenzo Huerta <lorenzo(at)nmsu(dot)edu>
To: pgsql-sql(at)postgresql(dot)org
Cc: pgsql-general(at)postgresql(dot)org
Subject: help with uniq index
Date: 1998-07-23 16:55:53
Message-ID: Pine.SOL.3.96.980723105318.5220G-100000@wilma
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is there a way to create a unique index on a field (in ver 6.3.1 )and also
have a single non-uniq value in that value, ie the NULL value?

Thanks,

__________________________________________________________________
* Lorenzo J. Huerta *
* Programming Assistant *
* Computing & Networking Networking Architecture and Operations *
* New Mexico State University *
* phone: (w)(505)646-2582 (h)(505) 521-8699 fax:(505) 646-8139 *
* e-mail: lorenzo(at)nmsu(dot)edu *
* Web Site: http://web.nmsu.edu/~ljhuerta *
__________________________________________________________________

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