Database systems

Types of Database System
Nazmul Hossen
ID:172015047
Subject: Database Systems
Department: Computer Science and Engineering
1

Contents
 Database
 Database Management System
 Database System
 Types of Database Systems
 Single User DBMS
 Multi User DBMS
 Centralized DBMS
 Distributed DBMS
 Parallel DBMS
 Client Server DBMS
2

Database
A database is a data structure that stores organized information. Most
databases contain multiple tables, which may each include several
different fields.
Example: A company database may include tables for products,
employees, and financial records and so on.
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Database Management System
A database management system (DBMS) is a software package
designed to define, manipulate, retrieve and manage data in a
database. A DBMS generally manipulates the data itself, the data
format, field names, record structure and file structure.
Some other DBMS examples include:
MySQL
SQL Server
Oracle
dBASE and so on.
4

Database System
The collection of Database and DBMS software together is known as a
database system. Through the database system, you can perform many
activities.
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Types of Database System
On the basis of the number of users
Single-User DBMS
Multi-User DBMS
On the basis of the site location
Centralized DBMS
Distributed DBMS
Parallel DBMS
Client/Server DBMS
6

Single User DBMS
 Supports only one user at a
time. If user A is using the
database user B or C must wait
until user A is through.
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Multi User DBMS
Multi user DBMS are the
systems that support two or
more users. All main frames and
mini computers are multi user
systems, but most personal
computers and workstations are
not.
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Centralized DBMS
Traditional form, all data,
functionality, apps are located
on one machine.
Access via communication links.
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Distributed DBMS
Decentralized functionality,
distributed among many
computers.
Storage computers are at
different geographical locations.
10

Parallel DBMS
 Parallel database systems
architecture consists of a
multiple CPUs and data storage
disks in parallel.
 They improve processing and
input/output speeds.
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Client Server DBMS
 Involves a client and a server.
 Clients are PCs or workstations.
 Servers are powerful
computers, can manage files,
printers, e-mails.
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Database systems

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