Relational Database is the form of structuring data in the form of records.A database stores the data in the form of 2 dimensional tables which contains keys on the columns for communication purpose in between the tables.RDBMS full form is Relational Data Base Management System is the software system used for managing and structure data in a systematic and proper way by using normalization techniques.
Examples of RDBMS:Microsoft SQLServer,Sybase SQLServer,Oracle,MySql,Microsoft Access