What is the function of a foreign key in a relational database table?
- to define a relationship with a primary key in a different table
- to uniquely identify a row within the table
- to create a many-to-one relationship within the table
- to add additional unique columns to the data table
Explanation: A foreign key is a column or a set of columns in one table that links to the primary key in another table.
Related exam: Module 7.5.2 Quiz - Introduction to Structured Queries
