WBCS.LIVE practice question

What is a NULL value in SQL?

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

Answer options

  1. A value that has been explicitly set to zero
  2. A default value assigned to a column
  3. A value that is missing or undefined
  4. A value that is empty but exists in the database

Correct answer and explanation

Correct answer: A value that is missing or undefined