Question

A special attribute with a unique value in a record in the relational model is called the – key​

Answer 1

Answer:

Key constraints

An attribute that can uniquely identify a tuple in a relation is called the key of the table. The value of the attribute for different tuples in the relation has to be unique. Example: In the given table, CustomerID is a key attribute of Customer Table

Answer 2

Answer:

Primary key

Explanation:

Primary key