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Re: Demo: Modelling Cost of Travel Paths Between Towns

From: Neo <neo55592_at_hotmail.com>
Date: 15 Nov 2004 17:28:59 -0800
Message-ID: <4b45d3ad.0411151728.739fd3ea@posting.google.com> 





> UPDATE your_table

> SET age = age + 1

> WHERE name = 'john'

> AND age IS NOT NULL




You are not actually suggesting a solution with NULLs, are you? 



On page 571, 6th Ed of "An Intro to Db Systems", CJ Date states "NULLs
and 3VL are a mistake and have no place in a clean formal system like
the relational model".
Received on Mon Nov 15 2004 - 19:28:59 CST












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