'Delete update anomalies' diaporamas de présentation

L02: Logical Database Design

L02: Logical Database Design. Introduction Functional Dependencies Normal Forms Normalization by decomposition. Life Cycle of Database Applications. Analyze the company situation Define problems & constraints Define objectives; scope and boundaries. Database initial study.

919 views • 55 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

1.07k views • 50 slides

Database Design: Normalization

636 views • 27 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

Schema Refinement

Schema Refinement. Chapter 19 (part 1) Functional Dependencies. The Evils of Redundancy. Redundancy is at the root of several problems associated with relational schemas: redundant storage, insert/delete/update anomalies Main refinement technique: decomposition

679 views • 20 slides