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Re: Constraints and Functional Dependencies

From: Marshall <marshall.spight_at_gmail.com>
Date: 24 Feb 2007 17:45:49 -0800
Message-ID: <1172367949.606658.81280@s48g2000cws.googlegroups.com> 





On Feb 24, 11:02 am, paul c <toledobythe..._at_oohay.ac> wrote:


> (Regarding set operators, SQL UNION seems to parallel OR and JOIN to AND

> and DELETE to AND NOT.  Does UPDATE parallel anything other than DELETE

> followed by UNION?)




I think of it as delete followed by insert these days, but your
approach


also works.




Marshall
Received on Sat Feb 24 2007 - 19:45:49 CST












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