User:Hp-NJITWILL

Relational Database:-

A relational database is a database that uses relations to store data in the tables. A database tables consists of attributes and tuples. An attributes are the columns in the table and tuples are rows in the table. Every database tables have a primary key that is always unique in the table. A foreign key is used to relate tables with each other. In the market a relational database is known as RDBMS (Relational Database Management System) which is different from DBMS(Database management System). DBMS is the old method to store data in the database, in which their are no relations between the database tables. Now a days mostly RDBMS is used. The concept of relational databases was derived from the principles of relational algebra which was presented by E. F. Codd in 1970.