Which of the Following States the Rule of Entity Integrity

question 22

Multiple Choice

Which of the following states the Rule of Entity Integrity?

• A) Every row must have a value for the primary key and each value must be unique.
• B) Every foreign key must appear as another table's primary key.
• C) Every row must have a value for the primary key and values may be repeated.
• D) None of the above.

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Definitions:

Poisson Distribution

A probability distribution that describes the occurrence of rare events or the number of events in fixed intervals of time or space.

Probability

A measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Stratified Random Sample

A sampling method that divides the population into strata, or subgroups, and selects random samples from each stratum to ensure representation.

Statistic

A numerical measurement describing some characteristic of a sample, used to infer properties of the population from which it was drawn.