Describe the Reason Why It Is Acceptable to Have Null

question 6

Essay

Describe the reason why it is acceptable to have null foreign key,but it is unacceptable to have a null primary key.Use the concept of entity integrity rule and referential integrity rule in your answer.

---

Definitions:

Former Slaves

Individuals who were previously enslaved but gained freedom, often after legal abolition of slavery or through escape.

Black Ministers

Religious leaders within the African American community who often play a significant role in cultural and social activism.

Reconstruction

The period after the Civil War in the United States when the southern states were reorganized and reintegrated into the Union from 1865 to 1877.

Public Offices

Positions of authority or service in government institutions, held by individuals who are either elected or appointed to perform public duties and administer public policies.