The Relational Algebra and Calculus

Lecture Discrete mathematics: Chapter 1.1 helps you to explore concepts in discrete mathematics using in computer systems. By following the book "Discrete Mathematics and Its Applications," Seventh Edition, by Kenneth H. Rosen, an introduction to the mathematical structures and concepts used in computing: sets, mathematical induction, ordered sets, Boolean algebras, predicate calculus, graphs, trees and relations will be presented in the course. Please refer to the detailed lecture content!

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In this chapter, we start by presenting the relational algebra, which forms the basis of the widely used SQL query language. We then cover the tuple relational calculus and the domain relational calculus, which are declarative query languages based on mathematical logic.

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Chapter 6 - Formal relational query languages. In this chapter, we start by presenting the relational algebra, which forms the basis of the widely used SQL query language. We then cover the tuple relational calculus and the domain relational calculus, which are declarative query languages based on mathematical logic.

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Chapter 4 - The Relational Algebra and Calculus presents about Relational Algebra (Unary Relational Operations, Relational Algebra Operations From Set Theory, Binary Relational Operations, Additional Relational Operations, Examples of Queries in Relational Algebra); Relational Calculus.

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part 1 book “database systems - a practical approach to design, implementation, and management” has contents: database environment, database architectures and the web, the relational model, relational algebra and relational calculus, object-relational dbmss,… and other contents.

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part 1 book “fundamentals of database systems” has contents: databases and database users, database system concepts and architecture, the relational data model and relational database constraints, the relational algebra and relational calculus, object and object-relational databases,… and other contents.

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In this chapter we discuss the two formal languages for the relational model: the relational algebra and the relational calculus. The main contents in this chapter include: Example database application (COMPANY), overview of the QBE language (appendix D),... Inviting you to refer.

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Chapter 6 "The relational algebra and relational calculus" present contents: The relational algebra, unary relational operations, relational algebra operations from set theory, binary relational operations,...

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In this chapter we discuss the two formal languages for the relational model: the relational algebra and the relational calculus. The main contents in this chapter include: Example database application (COMPANY), overview of the QBE language (appendix D),...

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Database System: Chapter 4 - The Relational Algebra and Calculus presents about Relational Algebra (Unary Relational Operations, Relational Algebra Operations From Set Theory, Binary Relational Operations, Additional Relational Operations, Examples of Queries in Relational Algebra); Relational Calculus.

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This chapter presents the relational model and three relational languages. The rela- tional model (Section 3.1) is used extensively throughout the text as is the relational algebra (Section 3.2). The chapter also covers the tuple relational calculus (Section 3.6) and domain relational calculus (Section 3.7) (which is the basis of the QBE language described in Chapter 5). Classes that emphasize only SQL may omit the relational calculus languages. Our notation for the tuple relational calculus makes it easy to present the con- cept of a safe query.

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The basic set of operations for the relational model is known as the relational algebra. These operations enable a user to specify basic retrieval requests. The result of a retrieval is a new relation, which may have been formed from one or more relations. The algebra operations thus produce new relations, which can be further manipulated using operations of the same algebra.

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