Databases

A database is a kind of electronic filing cabinet, a repository for a collection of computerized data files. A database system is a computerized record keeping system whose purpose is to maintain information and to make that information available on demand. Using a database management system, users will be able to

• Add new files to the database

• Insert new data into the existing files

• Retrieve data from existing files

• Update data in existing files

• Delete data from existing files

• Remove existing files from database

In addition, the modern database management systems can do the following:

• support the storage of very large amounts of data over a long period of time.

• Prevent unauthorized use of the data.

• Provide efficient access to the data.

• Control access to data from manyusers at the same time, without allowing the actions of one user to affect the other users.

So a database management system (DBMS) make the data or information compact and retrieval fast and accurate.

Relational Database

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