From: Another Trad <anothertrad@gmail.com>
To: pgsql-sql@postgresql.org
Subject: need nelp with aggregate functions
Date: Wed, 18 Nov 2009 13:55:16 -0300
Message-ID: <af7271950911180855n4ec2b0b1y484382a1123d903d@mail.gmail.com> (raw)
The DB structure is in attachment.
I with the number of clients and the number of computers that have
processors with "manufacturer" = "INTEL" and "speed" = "2GB"
I am trying:
select count(c) as qtd_client, count(cm) as qtd_computers
from cliente c
inner JOIN computer cm on (c.cliente_id = cm.cliente_id)
inner join processor p on (cm.processor_id = p.processor_id)
inner join speed s on (s.speed_id = p.speed_id)
INNER JOIN manufacturer m on (p.manufacturer_id=m.manufacturer_id)
where m.manufacturer = 'INTEL'
and s.speed = '2GB'
but is not working
anyone can help me?
Attachments:MODEL.jpg (image/jpeg, 20.7K) downloadview image
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Cc: anothertrad@gmail.com
Subject: Re: need nelp with aggregate functions
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