A Primary Key

question 78

Multiple Choice

A primary key:

• A) must include letters.
• B) must contain a unique value for each record within the table.
• C) has the same value for all records.
• D) is not usually necessary.

---

Definitions:

Relationship

The approach through which a connection is established between two or more concepts, items, or people, or the fact of being interconnected.

Relationship

A connection, association, or involvement between people, groups, or entities.

Obverses

Statements or propositions that are opposite or converse to each other, often involving a change in modality or quality while retaining the same subject and predicate.

Contrapositive

A logical statement obtained by negating and swapping the hypothesis and conclusion of a conditional statement.