The Relational Database Management System ( RDBMS ) is a software application used to create , manage and administer the Relational databases. The RDBMS is a type of Database management system specially designed for creating and managing the relational databases . So , the next questing you may be thinking , what is a relational database . And the most simple answer to this question is the databases, which are based on the relational model are defined as relational databases. In order to understand, the design of relational database we need to first study the relational model . Which we are going to discuss in detail, in this video tutorial. Some of the most commonly used Relational Database Management Systems ( RDBMS ) include, My SQL , Oracle , Microsoft SQL Server, and off course , there are many popular RDBMS software available in the database