SQL AVG() function introduction and examples
SQL AVG() function introduction and examples
Mar 2, 2020
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💡 SQL Interview Question: 👉 How do you convert GROUP functions into WINDOW functions in SQL? This is a very popular SQL interview topic to test your understanding of aggregations vs analytics. ❌ Using GROUP BY (Aggregated Result) SELECT department_id, AVG(salary) AS avg_salary FROM employees GROUP BY department_id; ✅ Using WINDOW Function (Row-Level Result) SELECT employee_name, department_id, salary, AVG(salary) OVER (PARTITION BY department_id) AS avg_salary FROM employees; 🎯 Explanation: G
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