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    Question

    Which of the following SQL queries will return the

    second highest salary from a table Employee with columns Name and Salary?
    A SELECT Salary FROM Employee ORDER BY Salary DESC LIMIT 2; Correct Answer Incorrect Answer
    B SELECT MAX(Salary) FROM Employee WHERE Salary NOT IN (SELECT MAX(Salary) FROM Employee); Correct Answer Incorrect Answer
    C SELECT Salary FROM Employee WHERE Salary = (SELECT Salary FROM Employee ORDER BY Salary DESC LIMIT 1 OFFSET 1); Correct Answer Incorrect Answer
    D SELECT Salary FROM Employee WHERE Salary = (SELECT DISTINCT Salary FROM Employee ORDER BY Salary DESC LIMIT 1 OFFSET 1); Correct Answer Incorrect Answer
    E SELECT TOP 2 Salary FROM Employee ORDER BY Salary DESC; Correct Answer Incorrect Answer

    Solution

    This query uses a subquery to find the maximum salary and excludes it using NOT IN. The outer query then finds the maximum salary among the remaining values, effectively identifying the second highest salary. тАв Why this works: The subquery isolates the highest salary. The outer query ensures the second highest value is identified without requiring an OFFSET. This method works across most SQL systems and avoids platform-specific syntax like LIMIT or TOP. ________________________________________ Why Other Options Are Incorrect: 1. LIMIT 2: Returns two highest salaries but doesnтАЩt isolate the second highest. 2. OFFSET 1: Many SQL platforms do not support LIMIT ... OFFSET or require modifications for accurate execution. 3. DISTINCT Salary: Redundant use of DISTINCT, which is unnecessary when ORDER BY already ensures unique ordering. 4. TOP 2: TOP is SQL Server-specific and requires additional filtering for the second value.

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