Logical Data Elements
Personnel
Database
Employee
Record 1
Name
Data
Payroll
File
Benefits
File
Employee
Record 2
Employee
Record 3
SS Salary Name
Data
Data
Data
SS Salary Name
Data
Data
Data
Employee
Record 4
SS Salary Name
Data
Data
Data
SS Salary
Data
Data
Database Management
Systems
Operating
System
Database
Management
•Database Development
•Database Interrogation
•Database Maintenance
•Application Development
Database
Management
System
Application
Programs
Databases
Data
Dictionary
Major Types of Databases
External
Databases on
the Internet &
Online
Services
Distributed
Databases on
Intranets &
Other Networks
Client
PC or
NC
End User
Databases
Network
Server
Operational
Databases of
the Organization
Data
Warehouse
Data
Mart
Data Warehouse and Data
Mining
Operational
Databases
Data
Acquisition
Subsystem
Warehouse
Design
Subsystem
Data
Management
Subsystem
Metadata
Management
Subsystem
Analytical
Data Store
Enterprise
Warehouse
Data Mart
Metadata
Directory
Metadata
Repository
Client
PC or
NC
Data Access
and Delivery
Subsystem
Web
Information
System
Web-Based Systems
The Internet
Intranets
Extranets
Network
Server
Web
Browser
Web Server
Software
Client PCs
or NCs
Web Objects
HTML pages
GIF image files
Video files
Data Resource Management
Data
Administration
Data
Planning
Database
Administration
Database
Structures
Hierarchical Structure
Network Structure
Dept A
Dept
Project A
Employee
1
Employee
1
Project B
Employee
2
Dept B
Employee
2
Project A
Employee
3
Project B
Relational Structure
Dept
Dname
Dloc
Dmgr
Empno
Ename
Etitle
Dept
A
1
A
B
2
B
C
3
C
Database Structures
(cont)
Bank Account Object
Attributes
•Customer
•Balance
Denver
West
Feb
East
Actual
Operations
•Deposit
•Withdraw
Budget
Sales TV
VCR
Margin TV
VCR
Multidimensional
Database Structure
Checking Account Savings Account
Object
Object
Attributes
Attributes
•Credit Line
•Mthly Statement
•Credit Line
•Mthly Statement
Operations
Operations
•Calculate Interest
•Print Mthly
Statement
•Calculate Interest
•Print Mthly
Statement
Object-Oriented
Database Structure
Accessing Files and Databases
Key
Transformation
Sequential
Organization
Key Fields
URLs
Indexed
Sequential
Access
Method
Sequential
Access
Direct Access
Database Development
1. Data Planning
Physical Models
Enterprise Model
5. Physical Design
2. Requirements
Specifications
Logical Models
User Needs
Description
4. Logical Design
3. Conceptual Design
Data Models