this is part 1 of database managment system conceptual design part 1

1. Chapter 2 : Conceptual Design

2. •Overview of DB Design
•Introduction to data model

3. Overview of DB Design
•The process of designing begins with
• an analysis of what information the database must hold and
• what are the relationships among components of that information
•DB design is the process of developing or producing a detailed data model of
a database
•The structure of the database is called as database schema

4. Database Life Cycle(DBLC)
•Just like information system, database also user goes evaluation and revision
under a framework called as Database Life Cycle(DBLC)
•DBLC encompasses the lifetime of the database
•It defines the stages involved for implementing a database

5. • Analyze Company situation
• Define problem and constraints
• Define Objectives
• Define Scope and Boundaries
•Phase-II :Database Design
• Conceptual Design
• E-R Diagram/Normalization
• Selection of DBMS software
• Create the Logical Design
• Create the Physical Design
• Database Design is an iterative process
Analysis
Database Design
The Phases of Life Cycle

6. •Phase-III : Implementation
• Installation of selected DBMS
• Create the Database
• Load the data/Convert from old system
• This requires aggregating data from multiple resources
•Phase-IV :Testing and Evaluation
• Test the database for performance integrity, concurrent access
and security constraints
• The testing and evaluation phase occur in parallel with
application programming.
Analysis
Database Design
Implementation
Testing and Evaluation

7. •Phase-V : Operation
• Database is considered to be operation once it has passes the
evaluation stage
• This phase begins with the process of system evolution
• Alternate form of testing
•Phase-VI : Maintainance
• Some of the periodic maintenance activities can be
• Preventive maintenance(backup)
• Corrective maintenance(recovery)
• Adaptive maintenance(enhancing performance, adding entities
and attributes and so on)
Analysis
Database Design
Implementation
Testing and Evaluation
Operation
Maintenance
The Phases of Life Cycle

8. •Generally database designer begin by developing a schema using an E-R or
object model.
•Then these schema are translated into relational model for implementation
E-R Design
Relational
Schema
Relational
DBMS
Information