What is the need of rdbms?
A DBMS stores data in a table where the entries are filed under
a specific category and are properly indexed. This allowed
programmers to have a lot more structure when saving or retrieving
data.
A relational database contains data in more than one table. Each
table contains a database that is then linked to other tables with
respect to their relationships.
Read more: Difference Between DBMS and RDMS | Difference Between
| DBMS vs RDMS
http://www.differencebetween.net/technology/difference-between-dbms-and-rdms/#ixzz1eJUZkRgz