RDBMS – Relational DataBase Management System
RDBMS is a database management system (DBMS) that is based on the relational model. In Relational database management system data is structured in database tables, fields and records.
RDBMS store the data into the collection of tables in form of tuples and attributes, which might be related by common fields (attribute). This relation among tables is also stored in the form of table. Some of the popular DBMS apart from Oracle are MS SQL Server, DB2 and MySQL.