Multiple choice technology databases

Null value in SQL represent?

  1. An empty String

  2. Zero

  3. NULL is the value used to represent an unknown piece of data

  4. Numeric

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

NULL in SQL represents a missing or unknown value, not an empty string, zero, or a numeric value. It is a special marker indicating the absence of data or that the value is unknown.