M Mr. Dubey 🎓 Coach ⭐ 103.11K Points 📊 MySQL Q. Which constraint ensures that all values in a column are different? (A) NOT NULL (B) DEFAULT (C) UNIQUE (D) INDEX 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) UNIQUE Explanation: The `UNIQUE` constraint ensures all values in a column are distinct.