Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Usenet -> comp.databases.theory -> Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?

Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?

From: Alfredo Novoa <alfredo_at_ncs.es>
Date: 13 Feb 2003 05:52:04 -0800
Message-ID: <e4330f45.0302130552.5f51736a@posting.google.com> 





Hi



hidders_at_REMOVE.THIS.ua.ac.be (Jan Hidders) wrote in message news:<3e4ad2b8.0_at_news.ruca.ua.ac.be>...



> There are two separate questions here:

> 1. Do we want duplicates in the data model, i.e., in the original relations

>    and the results of queries?




I only want to add that duplicates also ruin updateable views.



http://www.pgro.uk7.net/views3_0110.htm





Regards,


  Alfredo
Received on Thu Feb 13 2003 - 07:52:04 CST












Original text of this message













  HOME |
  ASK QUESTION |
  ADD INFO |
  SEARCH |
  E-MAIL US