'Legal relation r r' diaporamas de présentation

Tuple Relational Calculus and 4 th NF Association Rules

Lecture 14. Tuple Relational Calculus and 4 th NF Association Rules. CS 157B Prof. Sin-Min Lee. Unary Relational Operations Relational Algebra Operations from Set Theory Binary relational Operations Additional Relational Operations The Tuple Relational Calculus.

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RELATIONAL ALGEBRA (III)

CS157A. RELATIONAL ALGEBRA (III). Prof. Sin-Min LEE Department of Computer Science. Lecture 10. Unary Relational Operations: SELECT and PROJECT. The PROJECT Operation Sequences of Operations and the RENAME Operation The SELECT Operation. Relational Algebra Operations from Set Theory.

672 views • 49 slides

Chapter 7: Relational Database Design

CS157B. Lecture 8 MVD. Chapter 7: Relational Database Design. Example R = ( student_id, student_name, course_id, course_name ) F = { student_id ? student_name, course_id ? course_name } { student_id, course_id } is a candidate key. F c = F R 1 = ( student_id, student_name )

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Multi-valued Dependencies

Multi-valued Dependencies. Multivalued Dependencies. There are database schemas in BCNF that do not seem to be sufficiently normalized. Consider a database

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4N and the Normalization of Multivalue Dependency

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