WBCS.LIVE practice question

What is a primary key?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. A key used to connect two tables
  2. A key used to select data from a table
  3. A key that stores primary data
  4. A key that uniquely identifies a record

Correct answer and explanation

Correct answer: A key that uniquely identifies a record