1. SINGLE USER V/S MULTI USER
DATA MANAGEMENT SYSTEM
Submitted by:
RAMINDER PAL SINGH
12030141033

2. INTRODUCTION
• Database Management System: A Software Package/System
to facilitate the creation and maintenance of database.
• Types of Databases :
A DBMS can support many different types of databases.
Databases can be classified according to the number of users,
the database locations, and the expected type and extent of
use. The number of users determines whether the database is
classified as a single-user or multiuser.
Single-user database - 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.
Desktop database - A single-user database that runs on a
personal computer.

3. INTRODUCTION
Workgroup database - Supports a small number of users
(usually fewer than 50) or a specific department within an
organization.
Enterprise database - Used by an entire organization (usually
100's of users) across many departments.
Centralized database - Supports data located at a single site.
Distributed database - Supports data distributed across
several different sites.
Operational database - A database designed to support the
companies day-to-day operations. Also referred to as
transactional or production database.
Data Warehouses - focuses on storing data used to generate
information required to make tactical or strategic decisions.

4. SINGLE USER DBMS
• A single-user can access the
database at one point of time.
• These types of systems are
optimized for a personal desktop
experience, not for multiple users of
the system at the same time.
• All the resources are always
available for the user to work.
• The architecture implemented is
both One or Two tier.
• Both the application and physical
layer are operated by user.
• For Ex: Standalone Personal
Computers, Microsoft Access, etc.

5. MULTI USER DBMS
• Multi user DBMS are the systems that support two or more
simultaneous users. All mainframes and minicomputers are
multi-user systems, but most personal computers and
workstations are not.
• A multiuser database may exist on a single machine, such as a
mainframe or other powerful computer, or it may be
distributed and exist on multiple computers. Multiuser
databases are accessible from multiple computers
simultaneously
• Multiuser databases are accessible from multiple computers
simultaneously. Many people can be working together to
update information at the same time. All employees have
access to the most up-to-date information all of the time.
Customers have instant access to their personal information
held by companies

6. MULTI USER DBMS
 TELEPROCESSING: Applications
 One Computer with Programs
and DBMS
central processing unit
 N Terminals

7. MULTI USER DBMS
Workstation 2:
Apps Programs
 FILE-SERVER: and DBMS
Workstation 3:
Workstation 1: Apps Programs
Apps Programs and DBMS
and DBMS
Network
Request for data
FILES Returned
File Server Database

8. MULTI USER DBMS
Client 2:
Apps Programs
 CLIENT-SERVER:
Client 3:
Client 1: Apps Programs
Apps Programs
Network
Request for data
DATA Returned
SERVER(WITH DBMS) Database

9. COMPARISION BETWEEN SINGLE
USER AND MULTIPLE USER DATABASE
SINGLE USER DBMS MULTIPLE USER DBMS
Access Restricted to single user at a Access can share by Multiple user at a
time time
Database Structure relatively simple Complex Database Structure due to
shared access. Complexity Increases with
the structure of database
Switching between projects is difficult as Switching between projects is easy as
different schemas repositories are used single schemas repository is used

10. COMPARISION BETWEEN SINGLE
USER AND MULTIPLE USER DATABASE
SINGLE USER DBMS MULTIPLE USER DBMS
Committing change in the database Access sharing makes it difficult to make
without causing deadlock changes, sometimes causes deadlock
Infrastructure cost is minimum as Infrastructure such as Servers, Networks
database is accessed by single user at a are needed for shared access.
time Maintenance is also overhead expense
Wastage of CPU and resource when Optimum usage/optimization of the
user/application remain idle. resources between various users.

11. REFERENCES
• Fundamentals of Database System, By Navathe.
• Database System Concept by Korth.
• http://wiki.answers.com
• http://www.scibd.com
• http://www.gordonschools.aberdeenshire.sch.uk
• http://databasemanagement.wikia.com/wiki/DBMS