'Predicate calculus formula' diaporamas de présentation

Formal Relational Query Languages (BE V CSE)

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Chapter 27: Formal-Relational Query Languages

Chapter 27: Formal-Relational Query Languages. Outline. Tuple Relational Calculus Domain Relational Calculus Datalog. Tuple Relational Calculus. Tuple Relational Calculus. A nonprocedural query language, where each query is of the form { t | P ( t ) }

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Discrete Structures Lecture 26 Predicate Calculus Read Ch 9.1

Discrete Structures Lecture 26 Predicate Calculus Read Ch 9.1. 8.6(c) without using 8.23, part one. ( V i | 0 ? i < n+1: b[i]=0) ? b[0]=0 V ( V i | 0 < i < n+1: b[i]=0) 0 ? i < n+1 = < Remove abbreviation > 0 ? i ? i < n+1 = < 0 ? i ? 0=i V 0<i >

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Relational Calculus

A nonprocedural query language, where each query is of the form { t | P ( t ) } When we substitute values for the arguments, function yields an expression, called a proposition , which can be either true or false. It is the set of all tuples t such that predicate P is true for t

296 views • 12 slides