The Database Requirement That Foreign Keys Must Be Null or Have

question 62

Multiple Choice

The database requirement that foreign keys must be null or have a value corresponding to the value of a primary key in another table is formally called the

• A)entity integrity rule.
• B)referential integrity rule.
• C)unique primary key rule.
• D)foreign key rule.

---

Definitions:

Social Advantages

Benefits or privileges that individuals or groups have due to their position in society or social hierarchies.

Numerical Majority

Refers to the larger part of a group or population, representing the greatest number of individuals within the group.

Apartheid

Was a caste system based on race that existed in South Africa from 1948 until 1992. It consigned the large black majority to menial jobs, prevented marriage between blacks and whites, and erected separate public facilities for members of the two races. Asians and people of “mixed race” enjoyed privileges between these two extremes.

Ethnic Label

A term or descriptor applied to individuals or groups based on their ethnicity, often used to emphasize differences rather than similarities.