From: | Gary Stainburn <gary(dot)stainburn(at)ringways(dot)co(dot)uk> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: select best price |
Date: | 2005-10-26 15:38:48 |
Message-ID: | 200510261634.44796.gary.stainburn@ringways.co.uk |
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Thread: | |
Lists: | pgsql-sql |
On Wednesday 26 October 2005 4:21 pm, Gary Stainburn wrote:
> Hi folks
>
> I've got a table holding item code(cs_id), supplier a/c (co_id) , and
> price (cs_price).
>
> How can I select the rows containing the lowest price for each item
> code?
>
> I've tried various forms of min() etc and know it must be simple but
> I'm stumped.
>
> Gary
I've come up with the select below. Is there a better/more efficient
way of doing this?
select cp.cs_id, from cons_price_details cp,
(select cs_id, min(cs_price) as cs_price
from cons_price_details
group by cs_id
) v
where cp.cs_id = v.cs_id and cp.cs_price = v.cs_price;
--
Gary Stainburn
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