'Fd x' presentation slideshows

Schema Refinement and Normal Forms

Schema Refinement and Normal Forms. Chapter 19. The Evils of Redundancy. Redundancy is at the root of several problems associated with relational schemas: redundant storage, insert/delete/update anomalies

816 views • 70 slides

Relational Normalization Theory

Relational Normalization Theory. Chapter 8. Limitations of E-R Designs. Provides a set of guidelines, does not result in a unique database schema Does not provide a way of evaluating alternative schemas

804 views • 66 slides

Multivalued Dependencies

383 views • 30 slides

Multivalued Dependencies

403 views • 28 slides

Schema Refinement and Normal Forms

Schema Refinement and Normal Forms. Chapter 19. The Evils of Redundancy. Redundancy is at the root of several problems associated with relational schemas: redundant storage, insert/delete/update anomalies

412 views • 25 slides

Design Theory

274 views • 18 slides

4NF

294 views • 16 slides

Announcements

261 views • 12 slides

Canonical Cover & Normal Forms

328 views • 7 slides

Classroom Exercise: Normalization

Classroom Exercise: Normalization. Consider the relation R(A,B,C,D) with these given FDs: AB -> C C -> D D -> A Compute all nontrivial FDs that follow from these. Compute the key(s) for R. What are all the superkeys? What are all the BCNF violations? Decompose R into BCNF.

300 views • 6 slides

Classroom Exercise: Normalization

Classroom Exercise: Normalization. Consider the relation R(A,B,C,D) with these given FDs: AB -> C C -> D D -> A Compute all nontrivial FDs that follow from these. Compute the key(s) for R. What are all the superkeys? What are all the BCNF violations? Decompose R into BCNF.

176 views • 6 slides