'Relationship degree' diaporamas de présentation

Chapter 3 Data Modeling Using the Entity-Relationship Model

Chapter 3 Data Modeling Using the Entity-Relationship Model. Entity Relationship Model (ER). ER model was proposed by Peter Chen in 1976 ER model has become the standard tool for conceptual schema design

2.22k views • 81 slides

Chapter 7 Data Modeling Using the Entity-Relationship (ER) Model

Chapter 7 Data Modeling Using the Entity-Relationship (ER) Model. Chapter 7 Outline. Using High-Level Conceptual Data Models for Database Design A Sample Database Application Entity Types, Entity Sets, Attributes, and Keys

591 views • 40 slides

Relationship Degree

Relationship Degree. Indicates number of entities or participants associated with a relationship Unary relationship Association is maintained within single entity Binary relationship Two entities are associated Ternary relationship Three entities are associated.

373 views • 33 slides

Chapters 3 and 4 Drawing ERDs

323 views • 32 slides