Review: Equivalence of Relational Algebra and Relational Calculus Query Languages Having Aggregate Functions

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@article{1fbbf8109c2f11db8ed6000ea68e967b,

title = "Review: Equivalence of Relational Algebra and Relational Calculus Query Languages Having Aggregate Functions",

author = "Jensen, {Christian S{\o}ndergaard}",

year = "1999",

language = "English",

volume = "1",

journal = "SIGMOD Digital Review",

publisher = "Association for Computing Machinery",

}