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1. Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Slide 6- 1 2. Chapter 6The Relational Algebra andCalculusCopyright © 2007 Ramez Elmasri and Shamkant B. Navathe…

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Slide 1 Greedy Algo. for Selecting a Join Order The "greediness" is based on the idea that we want to keep the intermediate relations as small as possible at each…

Documents The Relational Algebra. 1 Relational Algebra Operations From Set Theory * UNIONUNION *...

Chapter 2: Introduction to Microprocessor-Based Control UNION Operation The result of this operation, denoted by R  S, is a relation that includes all tuples that are…

Documents The Relational Algebra

The Relational Algebra UNION Operation The result of this operation, denoted by R  S, is a relation that includes all tuples that are either in R or in S or in both R…