Answered: Draw the E-R diagram (Crow’s Foot…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The CJ Secondary School requires a new database management system in their library to

replace their existing manual system. Accordingly, their database should store information about

the members of the library (i.e. students and staff), available books, magazines and such. The

following is a more detailed sample of the data required from the two main entities in the

system.

Library members

• Membership number

• Name

• Type (student/staff/alumni etc.)

• Membership validity

Library items (books/magazines)

• Item ID (i.e. ISBN number, Dewey decimal number)

• Author/Editor

• Edition (optional)

• Abstract

• Publisher

• Title

• Type (book – hard/soft cover, magazine, journal, paper, e-book)

• Loan type (time restricted/red spot/normal)

Also required in the system is a method to track the library loans and returns. Each member of

the library is only allowed a limited number of loans for a fixed period of time. Renewals are

possible only for the first time round (i.e. only one renewal is allowed) for an extension of an extra

week. Items that are overdue are subject to a penalty.

List the possible business rules based on the scenario.
Identify all the entities and attributes.
Draw the E-R diagram (Crow’s Foot Model) and Relationship Schema to show the relationships between the entities and attributes.

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