Re: help with troublesome query

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От Bruno Wolff III
Тема Re: help with troublesome query
Дата
Msg-id 20030715134747.GC10467@wolff.to
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Ответ на help with troublesome query  (teknokrat <teknokrat@yahoo.com>)
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On Tue, Jul 15, 2003 at 14:26:16 +0100, teknokrat <teknokrat@yahoo.com> wrote:
> I have three tables customers which 1-many with requests which is 1-1 
> with applications. all customers have at least one request but not all 
> requests have an application.
> 
> I want a query to return all the customers and their application data if 
> they have any ( or else null). So this is like a left join of customers 
>  with applications but I do not want multiple rows of customers UNLESS 
> they have an application.

I think you want to first do an inner join of requests and applications
and then left join the customers and the previous join.


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