A PRIMARY KEY Constraint Can Be Added to an Existing

question 105

Multiple Choice

A PRIMARY KEY constraint can be added to an existing table by using the ____ clause of the ALTER TABLE command.​

• A) ​MODIFY
• B) ​ADD
• C) ​CONSTRAINT
• D) ​none of the above

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Definitions:

Protists

A diverse group of eukaryotic microorganisms, which are neither plants, animals, nor fungi, and often live in aquatic habitats.

Ancestry

The genetic heritage or lineage of an organism, tracing back through generations of parents and ancestors.

Histoplasma Capsulatum

A fungus that can cause histoplasmosis, a respiratory disease, when its spores are inhaled from contaminated environments.

Dermatophytes

A group of fungi that cause skin, hair, and nail infections by feeding on keratin in these tissues.