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Which operator is used to check the expression is not “NULL”?

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+1 vote
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in MySQL by (122k points)
Which operator is used to check the expression is not “NULL”?

(a) IS NULL

(b) NOT NULL

(c) ON

(d) None of the mentioned

This question was addressed to me during an online exam.

Asked question is from Null: the Four Letter Word topic in section Nulls and Conditions and Miscellaneous of MySQL

1 Answer

+1 vote
by (692k points)
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Best answer
Correct answer is (b) NOT NULL

The best explanation: None.

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