Database System

• A database system isacollection of data as well as programs required to manage that data.
• A database system isacomputerized record-keeping system.
• The main purpose of this system is to maintain data and provide it to the user when it is required.

1.Data

• Data is the most important component of database system.
• Data isacollection of facts stored in the database.
• The basic purpose ofadatabase system is to store, maintain and process data for the user.

2.Hardware

• The physical components ofacomputer system are called hardware.
• The hardware is used to perform different tasks such as input, storage and processing.
• Some important hardware components are as follov
  • Secondary storage
  • BUS
  • I/0 devices
  • Processors
  • Main memory

3.Software

• Software isacollection of programs used by computer withinadatabase system.
• The most important software is DBMS itself. It uses three type of software to enable the data base system work properly.
• These are as follows:
• Operating system software:
• DBMS Software

• Application programs and utilities.

• Operating system software:

  • It manages all hardware components.
  • It also enanles all other software to run on the computer.

• DBMS Software

  • to manages the database in the database system.

• Application programs and utilities:

  • the application programmers write application Programs to access data from database.

4. Personnel

The people related to the database system are called personnel. Different types of persons inadatabase system are as follows:

1.Database Administrators:

• They manage DBMS's use and ensure that database is functioning properly.

  • They are responsible of the whole database system.
  • They authorize access to database and monitor the use and working of database system.

• Application Programmers:

  • The application programmers write applicatior programs to access data from database.
  • End Users: End users are the people who use application programs to perform different tasks on database. They include clerks, managers and directors etc.