Question

In database management, what is a 'foreign key'?

A A key used to encrypt sensitive database fields so as to prevent unauthorized data access
B A key that uniquely identifies each row in the same table
C A key that can accept NULL and duplicate values within its own table only
D A key used exclusively for indexing purposes to speed up queries
E A column (or set of columns) in one table that references the primary key of another table
Practice Next

Relevant for Exams:

Hey! Ask a query