Logic and Databases

11/17/97


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Table of Contents

Logic and Databases

Boolean Logic

Limitations of Boolean Logic

Conjunctive Normal Form (CNF)

Conversion to CNF

Conversion to CNF (example)

Clauses

Clause sets

Horn Clauses

Horn Clauses

Resolution

Resolution (examples)

The closure of a clause set under resolution

Closure (Example)

Closures

Predicate Logic

Well Formed Formulae (wff)

Open and Closed Formulae

Deductive Databases

Deductive Databases

Assumptions:

The Use of Logic in Databases

Queries in Deductive Databases

Author: Marek