Chapter 6
Relational Algebra
Abstract
This chapter discusses the relational algebra operations that underlie both database design and SQL. The chapter emphasizes the procedural nature of relational algebra, and that the operations are used primarily by SQL command processors, rather than issued directly by a user.
Keywords
relational algebra
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When we use SQL to manipulate data in a database, we are actually using something known as the relational calculus, a method for using a single command to instruct the DBMS to perform one or more ...
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