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SELECT d.DEPARTMENT AS DEPARTMENT, CAST(min_salary AS DECIMAL(10, 2)) / NULLIF(CAST(max_salary AS DECIMAL(10, 2)), 0) AS SALARY_DIFF_RATIO FROM ( SELECT e.DEPT_NO, MIN(e.SALARY) AS min_salary, MAX(e.SALARY) AS max_salary FROM EMPLOYEE AS e GROUP BY e.DEPT_NO ) AS salary_info JOIN DEPARTMENT AS d ON salary_info.DEPT_NO = d.DEPT_NO ORDER BY SALARY_DIFF_RATIO DESC; ; SELECT 'Last_query_cost' AS "Variable_name", 0 AS "Value" FROM RDB$DATABASE;

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