Matakuliah
Tahun
: Sistem Informasi Manajemen
: 2008
POKOK BAHASAN
Pertemuan 10
Chapter 3
Data Management: Data,
Databases and Warehousing
Information Technology For Management 6th Edition
Turban, Leidner, McLean, Wetherbe
Lecture Slides by L. Beaubien, Providence College
John Wiley & Sons, Inc.
Bina Nusantara University
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Learning Objectives
•
Recognize the importance of data, managerial issues, and life
cycle
•
Describe sources of data, collection, and quality
•
Describe DMS
•
Describe Data Warehousing and Analytical Processing
•
Describe DBMS (benefits and issues)
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4
Introduction of Database
•
•
•
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File-Based Approach
Limitation of File Based Approach
Database Approach
The Database
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File-Based Approach
• File Based System is a collection of application
programs that perform services for the end-users as the
production of reports. Each program defines and
manages its own data
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6
Aspects
• Computerization:
– Hardware
– Software
– Data
• Information Needed:
– Programmer
– Users
– Database Administrator
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7
Database System Component
• Data:
– Shared Data
– Integrated
• Hardware
– Data Capacity
• Software:
– Creating File, Insert, Retrieving Data, Deleting Data, Security Control,
Integrity Control, Recovery Control
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8
File-Based Approach
File-Base Approach
CompanyName
ProductName
CategoryName
Quantity
UnitPrice
New England Seafood Cannery
Boston Crab Meat
Seafood
1
$18.40
New Orleans Cajun Delights
Chef Anton's Cajun Seasoning
Condiments
1
$22.00
Formaggi Fortini s.r.l.
Gorgonzola Telino
Dairy Products
1
$12.50
Grandma Kelly's Homestead
Grandma's Boysenberry Spread
Condiments
1
$25.00
Svensk Sjöföda AB
Bina Nusantara University
Gravad lax
Seafood
1
$26.00
9
Limitation of File Based-Approach
•
•
•
•
•
Separation and isolation of data
Duplication of Data
Data Dependence
Incompatible File Format
No Security
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10
Database Approach
• DBMS: A Software system that enables users to define, create,
maintain, and control access to the database
• Facilities:
• Its allows user to define the database through a Data Definition
Language
• Its allow user to Insert, Update, Retrieve data From The Database
through Data Manipulation Language
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11
DBMS
• Its provide controlled access to the database. For Example, it may
provide:
– A security system which prevents unauthorized users accessing the
database
– An integrity system which maintains the consistency of stored data
– A concurrency control system, which allows shared access of the
database
– A recovery control system
– A User control Catalog
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12
The Database
• Advantages of DBMS:
–
–
–
–
–
–
–
–
–
–
–
Control of data Redudancy
Data Consistency
More information from the same amount of data
Sharing of data
Improved Data integrity
Improved Security
Enforcement Standard
Economic of Scale
Balance of Conflicting Requirement
Improved Data Accessibility and responsiveness
Increased Productivity
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The Database
• Advantages of DBMS:
– Improved maintenance through data independence
– Increase concurrency
– Improved Backup and recovery Services
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The Database
• Disadvantages:
–
–
–
–
–
–
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Complexity
Size
Cost of DBMS
Additional Hardware Costs
Cost of Conversion
Performance
Higher Impact of a Failure
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15
Review Questions
• What differences between file-based
system and Database ?
• What is limitation of File-Based system ?
• What is DBMS ?
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