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From: Kacper Nowicki <Kacper.Nowicki@fuw.edu.pl>
To: Postgres Mailing List <postgres@postgres.Berkeley.EDU>
Subject: Retrieve query
Date: Mon, 6 Mar 1995 16:29:25 +0100 (MET)
Message-ID: <Pine.SUN.3.91.950306141432.20938G-100000@ccfs1> (raw)


Hi,

I have two classes: one with info about institutions and second with their
phone numbers (and with institution id). How should I write query which
returns institution name and phone number ? I need name even if there is
no phone number for it. Simple : 

retrieve (i.name, ph.number) where i.id=ph.id

returns only those instances from i which has matching entry in ph.

Thanks in advance,
Kacper

------------------------------------------------------------------------
Kacper Nowicki                         e-mail: Kacper.Nowicki@fuw.edu.pl
Warsaw University                      =================================
Physics Department Computer Center
Hoza 69, 00-681 Warszawa, Poland       fax: (+48)(22)294309


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