Presentation based on DBMS

1. What is Data
It is the quantities, characters, or symbols on which operations are
performed by a computer, which may be stored and transmitted in the
form of electrical signals and recorded on magnetic, optical, or
mechanical recording media.
for example - c=a+b

2. What is DBMS
A database management system (DBMS) is a software package designed to define,
manipulate, retrieve and manage data in a centralized database. A DBMS generally
manipulates the data itself, the data format, field names, record structure and file
structure. It also defines rules to validate and manipulate this data

3. Advantage of DBMS
• Better Data Transferring: Database management creates a place where users have
an advantage of more and better-managed data.
• Better Data Security: The more accessible and usable the database, the more it is
prone to security issues.
• Simple: Database management system (DBMS) gives a simple and clear logical
view of data. Many operations like insertion, deletion, or creation of files or data are
easy to implement.
• Data abstraction: The major purpose of a database system is to provide users with
an abstract view of the data.
• Reduction in data Redundancy: When working with a structured database, DBMS
provides the feature to prevent the input of duplicate items in the database. for e.g. –
If there are two same students in different rows, then one of the duplicate data will be
deleted.

4. Disadvantage of DBMS
 Cost of Hardware and Software
Educated staff (database administrator, application programmers, data entry
operations) who maintains the database management system also requires a good
amount. We need the database system designers to be hired along with application
programmers. Alternatively, the services of some software houses need to be taken.
So there is a lot of money which needs to be spent on developing software.
 Cost of Staff Training
This is the first disadvantage of the database management system. This is because,
for DBMS, it is mandatory to have a high-speed processor and also a large memory
size. After all, nowadays there is a large amount of data in every field which needs to
be store safely and with security.
 Complexity
 Higher impact of failure

5. DBMS Architecture
•The DBMS design depends upon its architecture. The basic client/server architecture is
used to deal with a large number of PCs, web servers, database servers and other
components that are connected with networks.
•The client/server architecture consists of many PCs and a workstation which are
connected via the network.
•DBMS architecture depends upon how users are connected to the database to get their
request done.

6. Types of ArchitecTure
 1st Tier Architecture
 2nd Tier Architecture
 3rd Tier Architecture