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D2 dn department dn - PowerPoint PPT Presentation

Relational Calculus and QBE

Relational Calculus and QBE. Chapter 8 (skim). The Relational Calculus. Like the Relational Algebra... An abstract DB language No aggregate operators R.A. and R.C. can accomplish the same results "relationally complete" "Queries" describe sets { | } with desired properties

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Relational Calculus and QBE