14. The term used to describe an attribute that can function like a primary key is a?

The answer to this question is given below in this explanation section.

Explanation:

In the relationship model of database  a primary key is a specific choice of a minimal set of attributes that uniquely specific a tuple in a relation.Informally  a primary key is which attribute and in simple cases are simple a single attribute.More  formally a primary key is a choice of candidate key any other candidate key is an alternate key.

A primary key may consists of real word observable in which way it is called natural key,while an attribute created to function as a key and not use for identification outside the database is called a surrogate key.For example for a database of people time and location of birth could be a natural key.National identification number is another example of an attribute that may be used as an natural key.

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