'Multivalued dependency' presentation slideshows

NORMALIZATION

NORMALIZATION. COSC 6340 Spring 2015. Objective. Normalization presents a set of rules that tables and databases must follow to be well structured. Historically presented as a sequence of normal forms. First Normal From. A table is in the first normal form iff

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Multivalued Dependency

CS157A Lecture 18. Multivalued Dependency. Prof. Sin-Min Lee Department of Computer Science. HIGHER NORMAL FORMS. BCNF. 5NF. 2NF. 4NF. 3NF. 1NF. functional dependencies. multivalued dependencies. join dependencies. STUDENT. MODULE. HOBBY. Pascal. Music. John. Databases.

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Chapter 15

Chapter 15. Normalization for Relational Databases. Lecture # 15 July 24 ,2012. General Definitions of Second and Third Normal Forms. Boyce-Codd Normal Form. Every relation in BCNF is also in 3NF Relation in 3NF is not necessarily in BCNF Difference:

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4NF & Multivalued Dependency

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Multivalued Dependencies Fourth Normal Form

Multivalued Dependencies Fourth Normal Form. Tony Palladino 157B. Multivalued Dependencies. Multivalued dependencies exit when the relation contains unnecessary duplication of data. BCNF is required in order to be in Fourth Normal Form Also referred to as equality-generating dependencies.

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MULTIVALUED DEPENDENCIES

MULTIVALUED DEPENDENCIES. Ha Do. Functional Dependency. a. 4. b. Q. c. $. Domain (X). Range (Y). Recall that if X uniquely determines Y, then Y is functionally dependent on X.

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