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_at_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 - 14:52:04 CET

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