Oracle-L: RE: Database Normalization-Outdated?

From: Shaibal Talukder <shaibal_talukder_at_hotmail.com>
Date: Wed, 01 May 2002 08:08:19 -0800
Message-ID: <F001.00454E59.20020501080819@fatcity.com>

List-

My Opinion:

The purpose of Normalization is to reduce redundant storage. It is a trade off between affording redundancy(as far as you can?)and avoiding to many joins later. It can not be true accross the board. Designers should go by the merit/requirements of the application. If database is normalized as and where it is possible(i.e. up to Boyce-Codd Normal Form); it might become a nightmare while trying to run BUSINESS OBJECTS/COGNOS/etc against it. As Hanna just mentioned joining 17 tables. AT my present work place I am dealing with a db which is so poorly designed. Now to be able to support BUSINESS OBJECT the developers are kind of taking band aid approach - asking for denormalizing the db tables with so called "WORK TABLES" - It is serving two purposes, saving them from "coding nightmares" and improving apps performance.

As far as RI is concerned I have seen in places they do not use RI rather loves to maintain data integrity by using triggers. My opinion on this - This is more of a preference than to do with any technicality. I am for RI.

Shaibal

>From: johanna.doran_at_sungard.com
>Reply-To: ORACLE-L_at_fatcity.com
>To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
>Subject: RE: Database Normalization-Outdated?
>Date: Wed, 01 May 2002 04:03:29 -0800
>

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Author: Shaibal Talukder
  INET: shaibal_talukder_at_hotmail.com

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Received on Wed May 01 2002 - 11:08:19 CDT