Anthony Klug (1982): Equivalence of Relational Algebra and Relational Calculus Query Languages having aggregate functions


Title: Equivalence of Relational Algebra and Relational Calculus Query Languages having aggregate functions
Author(s): Anthony Klug
Year: 1982
Journal: Journal of the ACM
Month: July
Volume: 29
Number: 3
Pages: 669-717

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