Introduction
A database is defined as a repository or a collection of logically related facts and figures which are used for the information need of the organization. The meaning of logical is that the database cannot be changed by any user apart from the database administrator. It shows the immunity of the user to change the database. The management of the database is done by software known as the database management system. This kind of software controls the access of the database, changing of the attributes of the database, updating the database through the use of the data manipulation language ( ...