Question

Which key is used to link two tables together?

• A. Primary key
• B. Unique key
• C. Foreign key
• D. Candidate key

Hint:

Foreign keys are essential in relational databases for establishing relationships between tables. They link rows in one table to rows in another, based on the primary key.

Answer 1

The Correct Option is C

A foreign key is used to link two tables together by referring to the primary key of another table. It ensures referential integrity by linking the rows in one table to the corresponding rows in another table.