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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Database Normalization-Outdated?
All,
Might as well add my 2 cents.
I say Normalize as we are supposed to, and not worry about designing an OLTP database for use by the latest query/reporting tools.
Lets face it, COGNOS and the rest just plain do not work against OLTP databases anyway. We end up either designing and implementing a warehouse or snapshot/materialized/views/summary tables for these products anyway. So why not keep the OLTP system designed as it should be. At least we will have a tight-nicely designed system where all of the rules are followed.
again, my opinion.
Tom Mercadante
Oracle Certified Professional
-----Original Message-----
Sent: Wednesday, May 01, 2002 12:08 PM
To: Multiple recipients of list ORACLE-L
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Subject: RE: Database Normalization-Outdated?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
>
-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Shaibal Talukder INET: shaibal_talukder_at_hotmail.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Mercadante, Thomas F INET: NDATFM_at_labor.state.ny.us Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Wed May 01 2002 - 11:53:29 CDT
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