The Relational Model is the conceptual and basis idea of relational databases which is produced by E.F. Codd in 1969 and it is a method of structuring data using relations which are grid-like mathematical structures consisting of columns and rows. Although the Relational Model borrows heavily from mathematics and uses mathematical terms such as domains, unions and ranges, the features and conditions it describes are easy to define using simple English. With the help Relational Model we can easy identify the unique data because there are many key constraints are used likes primary key, foreign key and candidate key etc.