nEED ANSWERED WITHIN 2 HOURS The relational model relies on primary keys to identify entities and on foreign keys to create relationships to preserve...

nEED ANSWERED WITHIN 2 HOURS

 The relational model relies on primary keys to identify entities and on foreign keys to create relationships to preserve the integrity (validity) of the keys. Discuss the two rules that ensure the integrity of keys within a database

Integrity of the primary key and foreign key in relationship diagram: - The relationaldatabase model represent the collection of data of the entity in the form of the table. Theprimary key is the...