CONCEPT OF DBMS

2016-2017
NASRULLAGANJ
Name – Karishma soni, Ritika
Dubey, Priya Pandey
Topic – Concept of DBMS
Class – B.sc. Vth sem (cs)
Submited to Submited By
Mr. C.L.Malviya & Karishma Soni , Ritika Dubey,
Priya Paney
M.r. Sanjay shinde

Data –
data, also known as primary data, is data (e.g., numbers, instrument readings,
figures, etc.) collected from a source. If a scientist sets up a
computerized thermometer which records the temperature of a chemical mixture
in a test tube every minute, the list of temperature readings for every minute, as
printed out on a spreadsheet or viewed on a computer screen is "raw data". Raw
data has not been subjected to processing, "cleaning" by researchers to
remove outliers, obvious instrument reading errors or data entry errors, or any
analysis (e.g., determining central tendency aspects such as
the average or median result.
• Information –
• A database management system (DBMS) is a computer software
application that interacts with the user, other applications, and the
database itself to capture and analyze data. A general-
purpose DBMSis designed to allow the definition, creation,
querying, update, and administration of databases.

Data base –
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"Database Software" redirects here. For the computer program,
• Database management system (DBMS)
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• is a computer software application that interacts with the user,
other applications, and the database itself to capture and analyze
data. A general-purpose DBMS is designed to allow the definition,
creation, querying, update, and administration of databases. Well-
known DBMSs include MySQL, PostgreSQL,MongoDB, Microsoft SQL
Server, Oracle, Sybase, SAP HANA, and IBM DB2. A database is not
generally portable across different DBMSs, but different DBMS can
interoperate by using standards such as SQL and ODBC or JDBC to
allow a single application to work with more than one DBMS.
Database management systems are often classified according to
the database model that they support; the most popular database
systems since the 1980s have all supported the relational model as
represented by the SQLlanguage.[disputed – discuss] Sometimes a DBMS is
loosely referred to as a 'database'.

Data Base Management System :-
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• Components of DBMS
• A database management system (DBMS) consists of several
components. Each component plays very important role in the
database management system environment. The major components
of database management system are:
• Software
• Hardware
• Data
• Users
• Software
• The main component of a DBMS is the software. It is the set of
programs used to handle the database and to control and manage
the overall computerized database
• DBMS software itself, is the most important software component in
the overall system
• Operating system including network software being used in
network, to share the data of database among multiple users.
• Application programs developed in programming languages such as
C++, Visual Basic that are used to to access database in database
management system. Each program contains statements that
request the DBMS to perform operation on database. The
operations may include retrieving, updating, deleting data etc . The
application program may be conventional or online workstations or
terminals.

• Advantages of DBMS
• The database management system has a number of
advantages as compared to traditional computer file-based
processing approach. The DBA must keep in mind these
benefits or capabilities during databases and monitoring the
DBMS.
The Main advantages of DBMS are described below.
Controlling Data Redundancy
• In non-database systems each application program has its
own private files. In this case, the duplicated copies of the
same data is created in many places. In DBMS, all data of an
organization is integrated into a single database file. The
data is recorded in only one place in the database and it is
not duplicated.
Sharing of Data
• In DBMS, data can be shared by authorized users of the
organization. The database administrator manages the data
and gives rights to users to access the data. Many users can
be authorized to access the same piece of
information simultaneously. The remote users can also share
same data. Similarly, the data of same database can be
shared between different application programs.

Data Consistency
By controlling the data redundancy, the data consistency is obtained. If a
data item appears only once, any update to its value has to be
performed only once and the updated value is immediately available to
all users. If the DBMS has controlled redundancy, the database system
enforces consistency.
• Disadvatage of DBMS
• 1. Costly
• 2. Maintinense
• 3. Sharing Data

CONCEPT OF DBMS

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CONCEPT OF DBMS