An Artificial Column Added to a Relation to Serve as the Primary

question 28

Multiple Choice

An artificial column added to a relation to serve as the primary key is a ________.

• A)composite key
• B)candidate key
• C)foreign key
• D)surrogate key
• E)dependency

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Definitions:

Life Span

The duration of time a living being, organism, or thing exists from its birth or creation to its death or destruction.

Cholesterol

A waxy, fat-like substance found in all cells of the body, which is essential for the formation of cell membranes, certain hormones, and vitamin D, yet high levels can lead to health problems.

Poverty

The state of being extremely poor, leading to a lack of access to basic needs such as food, shelter, and clean water.

Mosquitoes

Flying insects known for their ability to feed on blood, acting as vectors for transmitting various diseases such as malaria and the Zika virus.