A FOREIGN KEY Constraint Can Only Reference a Column in Another

question 33

Multiple Choice

A FOREIGN KEY constraint can only reference a column in another table that has been assigned a(n) ____ constraint.​

• A) ​NOT NULL
• B) ​UNIQUE
• C) ​CHECK
• D) ​none of the above

---

Definitions:

Mental Process

The internal, covert activities of the mind, such as thinking, reasoning, and remembering.

Classical Conditioning

is a learning process where a neutral stimulus becomes associated with a meaningful stimulus, producing a similar response, originally identified by Ivan Pavlov.

Operant Conditioning

A process of teaching in which a behavior's force is adjusted through the use of incentives or consequences.

Reinforcements

In psychology, it refers to anything that strengthens or increases the likelihood of a behavior by following it with a desirable outcome or reward.