The Entity Integrity Rule States That

question 75

Multiple Choice

The entity integrity rule states that:

• A) no primary key attribute can be null.
• B) referential integrity must be maintained across all entities.
• C) each entity must have a primary key.
• D) a primary key must have only one attribute.

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Definitions:

Single-Parent Families

Family units consisting of one parent living with their children, without the involvement of a second parent in the household.

Immigrants

Individuals who move to a country different from their place of birth to reside permanently.

Rural Area

A geographic area characterized by low population density and vast open spaces, often associated with farming or undeveloped land.

Reserve Army Of Labour

The reserve army of labour refers to a pool of unemployed or underemployed workers who can be quickly mobilized to meet labor needs, influencing wage levels and conditions within the capitalist system.