Some commonly used databases are: address book, library catalogue, telephone directory and stock list.
The computer program used to manage and query a database is known as a database management system. Database management system is a collection of database and DBMS utilities which are used to develop applications to satisfy the requirements of user by application developers under the supervision of database administrator. Database management system is software that is helpful in maintaining and utilizing a database.
The main objective of database management systems are data availability, data integrity, data security and data independence.
Database management systems must facilitate the major functions including:
*Defining of database schema
*Manipulation of database
*Sharing of database
*Protection of database
*Database recovery
Database Management system
