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Relational Algebra

Relational Algebra. Lecture #9. Querying the Database. Goal: specify what we want from our database Find all the employees who earn more than $50,000 and pay taxes in Champaign-Urbana. Could write in C++/Java, but bad idea Instead use high-level query languages:

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912 views • 63 slides

Relational Algebra

Relational Algebra. Eugene Sheng Computer Science Department NIU. Introduction . one of the two formal query languages of the relational model collection of operators for manipulating relations Operators: two types of operators

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344 views • 22 slides

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Relational Algebra

Relational Algebra