Relationship between tables in a relational model are created by

Explanation

Foreign Key is used to establish relationships between two tables. A foreign key will require each value in a column or set of columns to match the Primary Key of the referential table. Foreign keys help to maintain data and referential integrity. A composite Key is a set of two or more attributes that help identify each tuple in a table uniquely. and a Candidate keys are those attributes that uniquely identify rows of a table.