On Wed, Nov 18, 2009 at 9:55 AM, Another Trad <anothertrad@gmail.com> wrote:
> 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?
If you are getting an error message it's a good idea to post it as well.
However, first problem is that c and cm are tables, not fields. You
need to count some field from those tables.
