From: Oliveiros C, <oliveiros.cristina@marktest.pt>
To: Another Trad <anothertrad@gmail.com>
To: pgsql-sql@postgresql.org
Subject: Re: need nelp with aggregate functions
Date: Wed, 18 Nov 2009 17:16:52 -0000
Message-ID: <971C9BA25C4948E08D128793220A7DEE@marktestcr.marktest.pt> (raw)
References: <af7271950911180855n4ec2b0b1y484382a1123d903d@mail.gmail.com>
Try substituting the SELECT count(c) as qtd_client,count(cm) as qtd_computers
by
SELECT count( DISTINCT c.cliente_id) as qtd_client,count(/* put here the primary key of the computer table */ ) as qtd_computers
Then tell me if it output what you want
Best,
Oliveiros
----- Original Message -----
From: Another Trad
To: pgsql-sql@postgresql.org
Sent: Wednesday, November 18, 2009 4:55 PM
Subject: [SQL] need nelp with aggregate functions
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?
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To: pgsql-sql@postgresql.org
Cc: oliveiros.cristina@marktest.pt, anothertrad@gmail.com
Subject: Re: need nelp with aggregate functions
In-Reply-To: <971C9BA25C4948E08D128793220A7DEE@marktestcr.marktest.pt>
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