Re: 3vl 2vl and NULL

From: Gene Wirchenko <>
Date: Fri, 17 Feb 2006 14:42:22 -0800
Message-ID: <>

On 17 Feb 2006 14:21:47 -0800, "dawn" <> wrote:


>Although Date now defines 1NF differently, I think he has been
>consistent in defining "normalization" to be equivalent to 1NF. p149

     Reading for comprehension would help!

     For example, there is this
(<>): Chris Date Responds: Normal forms--Classical normalization theory admits of no level of normalization higher than fifth. Fifth is final, for reasons explained in AN INTRODUCTION TO DATABASE SYSTEMS."



Gene Wirchenko Received on Fri Feb 17 2006 - 23:42:22 CET

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