💡 SQL Interview Question: 👉 How do you display the second highest salary employee in each department using SQL? This is a classic SQL interview question to test your knowledge of window functions and ranking logic. Here’s the clean SQL query 👇 SELECT employee_name, department_id, salary FROM ( SELECT employee_name, department_id, salary, DENSE_RANK() OVER ( PARTITION BY department_id ORDER BY salary DESC ) AS rn FROM employees ) t WHERE rn = 2; 🎯 Explanation: DENSE_RANK() assigns ranks based
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💡 SQL Interview / Real-Time Question: 👉 How do you display each department’s total salary? Here’s the simple & powerful SQL query 👇 SELECT department, SUM(salary) AS total_salary FROM employees GROUP BY department; 🎯 Explanation: - GROUP BY department → groups all employees under each department - SUM(salary) → calculates total salary for every group - Used in HR, Payroll, Analytics, Reporting, and Backend systems This is a must-know SQL query for: ✔️ Java developers ✔️ Full Stack learners ✔
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