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Introduction to DBMS

by Team Impactmillions
7 minutes read

In this article, you’ll learn about what is data, database, database management system (DBMS) and its application, as well as advantages and disadvantages.

What is Data ?

Data is a raw fact and figures such as the name of a person, age, the location where is based, or any collection of a distinct small unit of information. It can be used in a variety of forms like text, numbers, media, bytes, etc.

What is Database?

A database is a collection of interrelated data and a database system is basically computer-based record keeping.

Purpose of Database

  • Database reduce the data redundancy (Duplication of data) to a large extent.
  • Database can control data inconsistency to a large extent.
  • Databases facilitate sharing of data.
  • Database enforce standards.
  • Databases can ensure data security (protection of data against accidental or intentional disclosure to unauthorized persons, or unauthorized modification or destruction).
  • Integrity can be maintained.

Type of Databases

A DBMS can support many different types of databases. Databases can be classified according to the number of users, the database location, and the expected type and extent of use.

  • Number of users: Single-User Database or Multiple User Database( Work-group or Enterprise).
  • Data Location: Centralized or Distributed Database.
  • Data Usage: Operational or Data Warehouse Database.

What is DBMS?

Database Management System = Database + A set of program to access the data/information from database.

The Database Management System is a collection of interrelated data (usually called a database) and a set of programs to access, update and manage those data (which form part of the management system).

Or DBMS is a software package to facilitate the creation and maintenance of computerized databases. Its general purpose is to:

  • Defining: Specifying data types and structure, and constraints for data to be stored.
  • Construction: Storing data in a storage medium.
  • Manipulating: Involve querying, updating, and generating results.
  • Sharing: Allowing multiple users and programs to access data simultaneously.

Components of DBMS

  1. Data
  2. Hardware
  3. Software
  4. Users

Popular DBMS Software

Popular-DBMS-Software
Popular-DBMS-Software

Here, is the list of some popular DBMS systems:

  • MySQL
  • Microsoft Access
  • Oracle
  • PostgreSQL
  • dBASE
  • FoxPro
  • SQLite
  • IBM DB2
  • LibreOffice Base
  • MariaDB
  • Microsoft SQL Server etc.

Application of DBMS

SectorUse of DBMS
BankingFor customer information, account activities, payments, deposits, loans, etc.
AirlinesFor reservations and schedule information.
UniversitiesFor student information, course registrations, colleges, and grades.
TelecommunicationIt helps to keep call records, monthly bills, maintaining balances, etc.
FinanceFor storing information about stock, sales, and purchases of financial instruments like stocks and bonds.
SalesUse for storing customer, product & sales information.
ManufacturingIt is used for the management of the supply chain and for tracking the production of items. Inventories status in warehouses.
HR ManagementFor information about employees, salaries, payroll, deduction, generation of paychecks, etc.
Application of DBMS

Advantages of DBMS

  • DBMS offers a variety of techniques to store & retrieve data.
  • DBMS serves as an efficient handler to balance the needs of multiple applications using the same data.
  • Uniform administration procedures for data.
  • Application programmers never exposed to details of data representation and storage.
  • A DBMS uses various powerful functions to store and retrieve data efficiently.
  • Offers Data Integrity and Security.
  • The DBMS implies integrity constraints to get a high level of protection against prohibited access to data.
  • A DBMS schedules concurrent access to the data in such a manner that only one user can access the same data at a time.
  • Reduced Application Development Time

Disadvantage of DBMS

DBMS may offer plenty of advantages but, it has certain flaws-

  • Cost of Hardware and Software of a DBMS is quite high which increases the budget of your organization.
  • Most database management systems are often complex systems, so training for users to use the DBMS is required.
  • In some organizations, all data is integrated into a single database which can be damaged because of electric failure or database is corrupted on the storage media
  • Use of the same program at a time by many users sometimes lead to the loss of some data.

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