Re: Curious SQL question
From: Marshall <marshall.spight_at_gmail.com>
Date: 3 Jan 2007 08:27:29 -0800
Message-ID: <1167841649.717837.187330_at_v33g2000cwv.googlegroups.com>
Date: 3 Jan 2007 08:27:29 -0800
Message-ID: <1167841649.717837.187330_at_v33g2000cwv.googlegroups.com>
On Jan 3, 6:10 am, Bob Badour <bbad..._at_pei.sympatico.ca> wrote:
>
> Perhaps a more instructive question would be: How does one identify
> those customers who bought no products at all?
Heh. Assuming that the definition of "customer" is someone who has bought some products, the question of what customers have bought no products at all can be answered without actually consulting the database; it is a tautology.
For the question to make sense, then, that can't be the definition of customer. Which brings us back to the question Bob asked.
Marshall Received on Wed Jan 03 2007 - 17:27:29 CET