The document discusses different types of database systems. It describes single user and multi user database management systems (DBMS), which are categorized based on the number of users. It also outlines centralized, distributed, parallel, and client-server database systems, which are classified based on the location of the site. Each type has distinct characteristics regarding the number and location of users, computers, and storage of data.

1. Types of Database System
Nazmul Hossen
ID:172015047
Subject: Database Systems
Department: Computer Science and Engineering
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2. 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
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3. 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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4. 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.
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5. 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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6. 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
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7. 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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8. 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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9. Centralized DBMS
Traditional form, all data,
functionality, apps are located
on one machine.
Access via communication links.
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10. Distributed DBMS
Decentralized functionality,
distributed among many
computers.
Storage computers are at
different geographical locations.
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11. 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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12. 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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