421. Department Salary Variance vs Company Average

Medium HR Analytics Compensation Analytics

Query Rules

The query columns and order must match the expected result schema.
NULL values should be handled appropriately where applicable.
The grader compares output values and sorting order to evaluate.

Schema Browser

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locations

3 cols

departments

3 cols

employees

6 cols

orders

6 cols

Reference Solution

Expected SQL

SELECT dept_id, AVG(salary) AS dept_avg_salary, AVG(salary) - (SELECT AVG(salary) FROM employees) AS variance_from_company_avg FROM employees GROUP BY dept_id ORDER BY variance_from_company_avg DESC;

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Console Output

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