Itshortcut

A R elational  database is a set of tables containing data fitted into predefined categories. Each table (which is sometimes called a relation) contains one or more data categories in columns. Each row contains a unique instance of data for the categories defined by the columns.

SQL  is just a ANSI standard, and is used as a base with most Database systems, like Microsoft  SQL  Server, Oracle, MySQL, IBM DB2 have used this as a base and extended/enhanced in their database systems.  DBMS  products like  SQL  Server, Oracle, MySQL, IBM DB2, etc uses  SQL  as a standard language.

Key  Difference between DBMS and RDBMS : The key  difference  is that  RDBMS (relational  database management system ) applications store data in a tabular form, while  DBMS  applications store data as files. ... There can be, but there will be no “relation”  between  the tables, like in a  RDBMS .

Is Define the Relationship Between the Various Data(Object/Entity).. RDBMS  is the basis for SQL, and for all modern database systems like MS SQL Server, IBM DB2, Oracle, MySQL, and Microsoft Access. A Relational database management system ( RDBMS ) is a database management system 

Database Management system Is Software. User Which Can Be manage the Data is known as Database Management System.                   In The Terms Of Technology All the Infrastructure All the data also Known as DBMS(Database Management System)