Re: Need help with a college SQL exam question...

From: "Josh Berkus" <josh(at)agliodbs(dot)com>
To: dejauser2001(at)yahoo(dot)co(dot)uk (dejauser2001(at)yahoo(dot)co(dot)uk), pgsql-sql(at)postgresql(dot)org
Subject: Re: Need help with a college SQL exam question...
Date: 2001-12-03 19:13:15
Message-ID: web-519065@davinci.ethosmedia.com
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"dejauser":

> Its coming close to my January examinations, and
> while revising I got stuck in the follwing question.
> I literally spent hours trying to solve it but I
> just can't :(

hmmm ... I don't think it's according to the honor code to ask us to
help with your exams. ;-)

> And the question is;
> Using SQL (using SELECT, FROM, WHERE, GROUP BY, COUNT(*), etc..)
> write a query
> to list the names of customers who have borrowed cars made by every
> maker.

It's doable. Just think "nested subselects" and heavy use of the HAVING
clause. They're also screwing with you by providing an irrelevant table
(shop) and not providing a relevant table (makers). If I was the
professor, I'd give the question writer a D+ for database design ...

-Josh

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