Question

The NULL value also means ___________

(a) value equal to zero

(b) unknown value

(c) negative values

(d) a large value

I have been asked this question by my college director while I was bunking the class.

My enquiry is from MySQL Setup topic in chapter General MySQL Use of MySQL

Answer 1

The correct answer is (b) unknown value

The explanation is: The NULL value in MySQL is a special value. It represents ‘no value’ or an ‘unknown value’. A NULL value can’t be compared like normal known values since it gives undesirable results.