Message-Id: <3.0.5.32.19990616100100.007ac9a0@mindspring.com>
Date: Wed, 16 Jun 1999 10:01:00 -0500
To: pgsql-sql@postgresql.org
From: Bob Kruger <bkruger@mindspring.com>
Subject: Query Question
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Here is a simple query question that has me stumped.

I have a database that contains the information on vehicle maintenance
costs.  When a repair is done to a vehicle, the tag number and the amount
of the repair is recorded.

table structure runs as follows:

id		serial
po		varchar(12)
veh_no		varchar(8)
cost		real
comments	varchar(30)

I would like to be able to do a query in which I can list all of the
vehicles and a totalization of the costs, e.g. list one vehicle number, and
the sum of costs for that vehicle.  Because there are numerous entries for
each vehicle I know that some part of the query will have to include
"distinct veh_no" so that only one output for each vehicle is listed.

I have figured out a way to do this with Perl, but it takes two selects,
and I would prefer to do this with just one.

Any hints or ideas?

Thanks in advance for any assistance.

Regards - Bob Kruger