Sunday, 3 July 2011


Data is one of the most important assets of a company. It is very important to make sure data is stored and maintained accurately and quickly. DBMS (Database Management System) is a system that is used to store and manage data.

A DBMS is a set of programs that is used to store and manipulation data. Manipulation of data include the following:

1. Adding new data, for example adding details of new student.
2. Deleting unwanted data, for example deleting the details of students who have completed course.
3. Changing existing data, for example modifying the fee paid by the student.

A DBMS provides various functions like data security, data integrity, data sharing, data concurrence, data independence, data recovery etc. However, all database management systems that are now available in the market like Sybase, Oracle, and MS-Access do not provide the same set of functions, though all are meant for data management.

Database managements systems like Oracle, DB2 are more powerful and meant for bigger companies. Whereas, database management systems like MS-Access are meant for small companies. So one has to choose the DBMS depending upon the requirement.

SQL Interview Questions and Answers

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