'Multivalued attributes' diaporamas de présentation

THE ENTITY RELATIONSHIP MODEL (ERM)

THE ENTITY RELATIONSHIP MODEL (ERM). THE ENTITY RELATIONSHIP MODEL (ERM). The Relational Database Model, that the ERM forms the basis of an ERD.

1k views • 87 slides

Chapter 2 Entity-Relationship Model

Chapter 2 Entity-Relationship Model. 2.1 Introduction 2.2 Basic concepts 2.3 mapping constrains 2.4 keys 2.5 Entity Relationship Diagram 2.6 Weak Entity Sets 2.7 Extended E-R Features 2.8 Reduction of an E-R Schema to Table. 2.1 Introduction.

593 views • 43 slides

Chapter 7 Data Modeling with Entity Relationship Diagrams

Chapter 7 Data Modeling with Entity Relationship Diagrams. Database Principles: Fundamentals of Design, Implementation, and Management Tenth Edition. Objectives. In this chapter, students will learn: The main characteristics of entity relationship components

417 views • 39 slides

Database Management system

599 views • 27 slides

Agenda and Objectives

Agenda and Objectives. Agenda Examine normalized and non-normalized ERDs/Tables Objectives Given an ERD, you will be able to determine whether or not it is in 3NF. Given a non-normalized ERD (or database table), you will be able to revise it to make it 3NF compliant. Resource

272 views • 26 slides

Fundamentals/ICY: Databases 2013/14 WEEK 6 - Friday

Fundamentals/ICY: Databases 2013/14 WEEK 6 - Friday. John Barnden Professor of Artificial Intelligence School of Computer Science University of Birmingham, UK. Reminder of Monday. A Weak Entity in an ERD. New. The Attributes of the STUDENT Entity. Attributes.

301 views • 20 slides

Data Modeling

Data Modeling. Advanced Concepts. Common Modeling Situations. Unary relationships Binary relationships Ternary relationships Attributive or Weak Entities Associative or Intersection Entities Supertypes and Subtypes. Degree of Relationship. Degree

335 views • 19 slides

The Relational Database Design

The Relational Database Design. ER- and EER-to-Relational Mapping. ER to Relational Mapping. Mapping of regular entity types Multivalued attributes Mapping of relationship Binary relationship N-ary relationship Mapping of weak entity types Mapping of specialization and generalization.

223 views • 14 slides