From: | Richard Huxton <dev(at)archonet(dot)com> |
---|---|
To: | Együd Csaba <csegyud(at)freemail(dot)hu>, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Join or Where? |
Date: | 2003-06-26 13:09:01 |
Message-ID: | 200306261409.01688.dev@archonet.com |
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Lists: | pgsql-sql |
On Thursday 26 Jun 2003 12:21 pm, Együd Csaba wrote:
> Urgent Help : Use of return from function/procedure.Hi,
> could anybody tell me what can be the difference between these queries?
> There are a big difference but I can't understand the reasons. For some
> reasons the firs query calculates getup column in a wrong way. It allways
> devides with 10. (???) While the getupquantity column comes well.
>
> With the second query everything is ok.
1 > select (select getupquantity from t_products where id=productid) as
2 > getupquantity,
3 > quantity,
4 > (select quantity/getupquantity) as getup
5 > from t_stockchanges, t_products
6 > where (getupquantity<>0)
7 > limit 30;
I don't think the t_products in the first line is the same as that in the
fifth line - that'd surely mess up your values.
--
Richard Huxton
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