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What is a Database Management System? What are the three principle components of a DBMS ?...

What is a Database Management System? What are the three principle components of a DBMS ? Explain the functions of each of them.

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Answer #1

The DataBase Manageent System(DBMS) is a software that allows creating and managig databases.It provides users a systemetic way to create update retrieve and manage data.
DBMS essentially serves as an interface between the databases and end users or application programs,ensuring that data is consistently organised and easily available.

Principle components of DBMS

  1. Software
  2. Hardware
  3. Data
  4. Procedures
  5. Database Access Language
  6. Users
  • Software:
    It's the main component of DBMS.It's a set of programs that allows to handle the database and to control and manage the overall database.
    Operating System including network software being used in network to share data of database among everal users.
  • Hardware
    Hardware consists of set of physical electronic devices such as set of computers,storage devices,I/O channels etc.
    It's impossible to implement the DBMS without such hardwares.
    In a network a computer with efficient processing speed , large storage capacity is used as database server.
  • Data
    The main pupose od the DBMS is to process data.
    In DBMS,databases are defined then created and data is stored,updated,retrieved to and from the databases.
    The databases contains both the actual data and the metadata.
  • Procedures
    Procedures refer to instructions and rules that help in designing the database and to use the DBMS.The users that operate and manage the DBMS require documented procedures on hot use or run the database management system.
    Here are some examples of procedures
  1. ​Procedure to install new DBMS
  2. to log on to the DBMS.
  3. To use the DBMS or application programs.
  4. To make backup copies of databases.
  5. to generate the reports of data retrieved from databases.
  • DataBase Access Language
    Database access language is used to access the data to and from the database.
    The users use the database access language to enter new data, change the existing data in database and to retrieve required data from databases.
    The database engine generates a set of results according to the commands submitted by user, converts these into a user readable form called an Inquiry Report and then displays them on the screen.
    The administrators may also use the database access language to create and maintain the databases.
    The most commonly used language is SQL(Structured Query Language).
  • Users
    The users are those who manage the databases and perform different operations on databases in the DBMS.
    There are three kind of users
  1. Application Programmers
  2. End Users
  3. database Administrators
  • Application Programmers
    The people who write application programs in any programming language(like C++,java,Visual Basic etc) to interact with databases are calle application Programmers.
  • End Users
    The end-users are those people who interact with the database and perform different operations on the databas such as inserting,updating,retrieving the data to and from databases.
  • Database Administrator
    A person who is responsible for managing the whole database management system is known as database Administrator or DBA.
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