What Is the Purpose of a Primary Key

question 22

Multiple Choice

What is the purpose of a primary key?

• A)To establish a link from one table to another
• B)To be the first identifier, which does not need to be unique
• C)To use a row that uniquely identifies a column
• D)To link a column to another column

---

Definitions:

Social Reform Movements

Collective efforts aimed at making significant changes in society to improve conditions and justice, often related to rights, equality, and the well-being of community members.

Burned-Over District

A term for the western and central regions of New York State in the early 19th century, which were repeatedly swept by religious revivals.

Erie Canal

The Erie Canal is a significant historical waterway in New York, opened in 1825, which played a critical role in the commercial expansion of the United States by connecting the Great Lakes to the Atlantic Ocean.

Great Lakes

are a group of five large freshwater lakes in North America, forming the largest group of freshwater lakes in the world by total area.