Lecture -1

Introduction to Very basics Guides through Different design stages Familiarize with a tool Emphasis on Design stages of Databases

Assignment + Quizes = 10% Mid Term = 25% Terminal = 40% Practical = 25%

Passing Criteria = 50% (In each Terminal & Practical Exams)

Database Definition

Comparison with the prior Data Processing approach

Pros & Cons of Databases

What is a Database

A database is a shared collection of logically related data that is stored to meet the requirements of different users of an organization

A database is a self-describing collection of integrated records

A database models a particular real world system in the computer in the form of data

Accounting

AccountsPayable

Accounts Receivable

Management

ControlPlanning

Manufacturing

ProductionScheduling

Marketing

Product Development

Sales

CorporateDatabase

Computer initially used for computational/ engineering purposes

Commercial applications introduced File Processing System

A collection of programs that perform services for the end-users such as production of reports

Program and Data Interdependence

RegistrationApplications

Registrat ionDataFiles

Registration

ExaminationApplications

ExaminationDataFiles

Examination

LibraryApplications

LibraryDataFiles

Library

Fine

Books Issued

Father Name

Name

Reg_Number

Library

Grade

Semester

Class

Address

Name

Reg_Number

Examination

Class

Address

Phone

Father Name

Name

Reg_Number

Registration

Duplication of Data

Vulnerable to Inconsistency

Advantages of Database ApproachAdvantages of Database ApproachRegistrationExamination

LibraryApplications

Library

ExaminationApplications

RegistrationApplications

Database Management

System

University StudentsDatabase

- Data Sharing - Data Independence

- Controlled Redundancy - Better Data Integrity