B Y B I S H A L G H I M I R E

b i s h a l . g h i m i r e @ g m a i l . c o m

Introduction To Database

Concept of Database

Organized Collection of Information

Telephone Book

Recipe Book

Mailing List

Database

Set of data related to specific purpose or topic

Access - Includes tools needed to work with data

Sorting

Extracting

Summarizing

Database Terminology

Table

A list of related information in columns & rows

Each row in the table is Record

Each Column in the table is category or Field

One Item of data is called a Data Value

E.g. – your actual phone number in phone book

DBMS

DBMS

A software package for the creation and maintenance of a computerized database

Provides

Efficient

Reliable

Convenient

Safe

Multi User

Massive Storage

Persistent data

DBMS Capabilities

Basic operations such as addition, delection, and modification

Selectively retriving data

Sorting and indexing of database

Generate Reports

Mathematical Calculation using built-in functions

System Applications

Banking

Airlines

Universities

Credit Card Transactions

Telecommunication

Finance

Sale

Manufacturing

Human resources

Data Independence

Physical Data independence

Organizing the file at physical level

Changing physical storage devices

Without changing the conceptual view or any external view

Application remain same even if any change at physical level

Logical Data independence