Project work by second-year Information Technology students of the Federal University of Technology, Minna.

Notes of ENTITY RELATIONSHIP Modelling Entity – Relationship(ER) Modelling ER Model Concepts --Entities and Attributes -- Entity Types, Value Sets, and Key Attributes --Relationships…

A P P E N D I X A Network Model In the relational model, the data and the relationships among data are represented by a collection of tables. The network model differs from…

Entity Relationship Diagrams Goals of Database Design ± To full fill information requirements of the users and application ± To support all processing requirements as well…

Entity Relationship Model Introduction to Entity-Relationship (E-R) Modeling  Notation uses three main constructs    Data entities Relationships Attributes A…

Entity-Relationship Data Model Elements of E-R Model  In the E/R model, the structure of data is represented graphically, as an “entityrelationship diagram,” using…

Definition of Database Data are facts that can be recorded and have implicit meaning. Data refers to values such as names, telephone, addresses that can be easily stored…

Albi Fitransyah, S.Si, M.T   An entity set that does not have a primary key is referred to as a weak entity set. The existence of a weak entity set depends on the existence…

Copyright © 2007 Ramez Elmasr and Shamkant B. Navathei Slide 3- 1 Chapter 3 Data Modeling Using the EntityRelationship (ER) Model Copyright © 2007 Ramez Elmasri and Shamkant…

1. Chapter 2: Entity-Relationship Model Entity Sets Relationship Sets Design Issues Mapping Constraints Keys E-R Diagram Extended E-R Features Design of an E-R Database Schema…