Eleventh Edition

1

Introduction to Information Systems Essentials for the Internetworked E-Business Enterprise

Irwin/McGraw-Hill Copyright © 2002, The McGraw-Hill Companies, Inc. All rights reserved.

C h a p t e r

James A. O’Brien

5Data

Resource

Management

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• Explain the importance of implementing data resource management processes and technologies in an organization.

• Outline the advantages of a database management approach to managing the data resources of a business.

• Explain how database management software helps business professionals and supports the operations and management of a business.

Chapter Objectives

Eleventh EditionJames A. O’Brien 3Introduction to Information Systems

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• Provide examples to illustrate each of the following concepts:– Major types of databases– Data warehouses and data mining– Logical data elements– Fundamental database structures– Database access methods– Database development.

Chapter Objectives

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Logical Data Elements

EmployeeRecord 2

EmployeeRecord 1

EmployeeRecord 3

EmployeeRecord 4

Name SS Salary Name SS Salary Name SS Salary Name SS Salary

Data Data Data Data Data Data Data Data Data Data Data Data

PersonnelDatabase

PayrollFile

BenefitsFile

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OperatingSystem

DatabaseManagement

System

ApplicationPrograms

OperatingSystem

DatabaseManagement

System

ApplicationPrograms

Databases

DataDictionary

DatabaseManagement

•Database Development•Database Interrogation•Database Maintenance•Application Development

Database Management Systems

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Network Server

Network Server

ExternalDatabases onthe Internet &

Online Services

Client PC or

NCOperational

Databases ofthe Organization

DataMart

End UserDatabases

DataWarehouse

DistributedDatabases on

Intranets & Other

Networks

Major Types of Databases

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Data Warehouse and Data Mining

Client PC or

NCAnalyticalData StoreEnterpriseWarehouseData MartData

AcquisitionSubsystem

WarehouseDesignSubsystem

DataManagementSubsystem

Data Accessand DeliverySubsystem

Data Accessand DeliverySubsystem

Web Information

System

Web Information

System

OperationalDatabases

MetadataDirectory

MetadataRepository

MetadataManagementSubsystem

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Web-Based Systems

WebBrowser

Web ServerSoftware

Web ServerSoftware

NetworkServerThe Internet

IntranetsExtranets

Client PCsor NCs

HTML pagesGIF image filesVideo files

Web Objects

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Data Resource Management

DataAdministratio

n

DataPlanning

DatabaseAdministration

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Database Structures

Employee2

Employee2

A

Empno Ename Etitle Dept

1

2 B

3 C

Relational Structure

Network StructureHierarchical Structure

Employee3

Project BProject A

Dept Dname Dloc Dmgr

A

B

C

Employee2

Employee1

Project A

Employee1

Dept A Dept BDept

Project B

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Database Structures (cont)

East

WestDenver

FebActual Budget

Margin

Sales TV

VCR

TV

VCR

MultidimensionalDatabase Structure

Attributes•Customer•BalanceOperations•Deposit•Withdraw

Bank Account Object

Attributes•Credit Line•Mthly StatementOperations•Calculate Interest•Print Mthly Statement

Checking AccountObject

Attributes•Credit Line•Mthly StatementOperations•Calculate Interest•Print Mthly Statement

Savings AccountObject

Object-OrientedDatabase Structure

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Key Fields

SequentialAccess

SequentialOrganization

IndexedSequential

AccessMethod

KeyTransformation

Direct Access

URLs

Accessing Files and Databases

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Database Development

User NeedsDescriptionUser NeedsDescription

1. Data Planning1. Data Planning

Enterprise ModelEnterprise Model

2. RequirementsSpecifications

2. RequirementsSpecifications

3. Conceptual Design3. Conceptual Design

4. Logical Design4. Logical Design

Physical ModelsPhysical Models

5. Physical Design5. Physical Design

Data ModelsData Models

Logical ModelsLogical Models

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• Data resource management is a critical management activity. Management roles include database administration, data planning, and data administration.

• Under the database management approach, data records are consolidated into databases that can be accessed by many different application programs, serving multiple users.

Chapter Summary

Eleventh EditionJames A. O’Brien 15Introduction to Information Systems

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• Database management systems are software packages that simplify the creation, use, and maintenance of databases.

• Several types of databases are used by organizations including operational, distributed, external, data warehouses and data marts.

• Database development for large corporate databases requires a top-down planning effort involving planning, requirements specification and logical and physical design.

Chapter Summary (cont)