Database management

Today one of the wide applications of computer is in the field of database managements. Database constitutes the most important component of any computer based information systems. A database may be defined as collections of inter- related relevant data store together to serve multiple applications. A data base management system is a collection of software package for processing the database
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A database management system provides the technology for achieving more effective and efficient integrated information system. The major objective of designing any database management package is to provide its users an appreciably higher level framework such that the relevant interrelated data can be collected and stored together useful to some multiple applications.

Database management system further provides a security measure for the data that are stored in it. Database management system also helps in ease of maintaining the collected data such as modifying, deleting or for inserting new data also.

Designing a database management system is a very clumsy, tedious and time consuming task. It needs to check out all the relationship between data that are to be entered so that modification of one data in one place is just able to change the data in other place also. In each database there is a ‘key’ associated with it which is responsible for maintaining relationship between data. Therefore selection of key is a very important task in designing a database.