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Re: The Practical Benefits of the Relational Model

From: Jan.Hidders <hidders_at_hcoss.uia.ac.be>
Date: 4 Oct 2002 15:04:40 +0200
Message-ID: <3d9d91e8$1@news.uia.ac.be>


In article <bdf69bdf.0210031023.375229d8_at_posting.google.com>, Mikito Harakiri <mikharakiri_at_yahoo.com> wrote:
>
>It is often emphasized how beatuful relational theory is, because it
>is based on the set theory. While there is undoubtedly some
>connections, but may I ask why set union is a basic relational
>operator, and intersection is not? (Intersection could be expressed
>via combination of join and projection).

Why do you ask questions and then put the answer right behind it in brackets? :-)

Received on Fri Oct 04 2002 - 08:04:40 CDT

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