'Multivalued dependencies' presentation slideshows

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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Fundamentals/ICY: Databases 2010/11 WEEK 10

Fundamentals/ICY: Databases 2010/11 WEEK 10. John Barnden Professor of Artificial Intelligence School of Computer Science University of Birmingham, UK. Reminder of Week 9. But 2NF can still have Undesirable Dependencies. A prime attribute is one that is within some candidate key

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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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Normalization

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Multivalued Dependencies

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Chap3 Morgan Importing (p. 98)

Chap3 Morgan Importing (p. 98). A. Morgan keeps a table of data about the stores from which he purchases. The stores are located in different countries and have different specialties. Consider the following relation: STORE (Name, City, Country, Owner, Specialty)

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Appendix B: Advanced Relational Database Design

Appendix B: Advanced Relational Database Design. Appendix B: Advanced Relational Database Design. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued Dependencies.

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Multivalued Dependencies

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Multivalued Dependencies

Multivalued Dependencies. Intuition. Redundancy: addresses, title repeated several times because a star might have several addresses and stars in several movies yet, the relation is in BCNF (no nontrivial functional dependency) Reason: address and name are independent on each other.

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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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Appendix B: Advanced Relational Database Design

Appendix B: Advanced Relational Database Design. Appendix B: Advanced Relational Database Design. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued 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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Appendix C: Advanced Relational Database Design

Appendix C: Advanced Relational Database Design. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued Dependencies.

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Appendix C: Advanced Relational Database Design

Appendix C: Advanced Relational Database Design. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued Dependencies.

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Appendix C: Advanced Normalization Theory

Appendix C: Advanced Normalization Theory. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued Dependencies.

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Appendix C: Advanced Normalization Theory

Appendix C: Advanced Normalization Theory. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued Dependencies.

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Appendix C: Advanced Normalization Theory

Appendix C: Advanced Normalization Theory. Reasoning with MVDs Higher normal forms Join dependencies and PJNF DKNF. Theory of Multivalued Dependencies.

129 views • 12 slides