Multiple choice technology databases

A key made up of more than one column is called

  1. Complex Key

  2. Secondary Key

  3. Composite Key

  4. Foreign Key

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A composite key is a key that consists of two or more columns used together to uniquely identify a row in a table. Unlike a simple key that uses a single column, composite keys combine multiple columns to ensure uniqueness when no single column can uniquely identify records.