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20 points on win
Medium
SQL Quest
Practice joins, aggregations, filters, and window functions on compact datasets.
SQL Quest
Choose the Correct Query
Goal: return average salary per department.
SELECT department, AVG(salary) FROM employees;
SELECT department, AVG(salary) AS avg_salary FROM employees GROUP BY department;
SELECT AVG(salary) FROM employees GROUP BY name;
SELECT department FROM employees WHERE AVG(salary) > 0;
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