📊 MySQL
Q. Which function returns NULL if expr1 = expr2?
  • (A) CASE
  • (B) CHECK TABLE
  • (C) IFNULL()
  • (D) NULLIF()
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✅ Correct Answer: (D) NULLIF()

Explanation: This question asks about a function in MySQL that checks if two expressions are equal. If they are equal, it returns NULL. Let's break down the options:

Explanation by: Ranjeet
This question asks about a function in MySQL that checks if two expressions are equal. If they are equal, it returns NULL. Let's break down the options:

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