SQL exercises on employee Database: Display the Grade, Number of employees, and maximum salary of each grade
SQL employee Database: Exercise-99 with Solution
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99. From the following table, write a SQL query to list the grade, number of employees, and maximum salary of each grade.
Sample table: employees
Sample table: salary_grade
SELECT s.grade, count(*), max(salary) FROM employees e, salary_grade s WHERE e.salary BETWEEN s.min_sal AND s.max_sal GROUP BY s.grade;
grade | count | max -------+-------+--------- 4 | 5 | 3100.00 1 | 3 | 1200.00 5 | 1 | 6000.00 3 | 2 | 1700.00 2 | 3 | 1400.00 (5 rows)
Relational Algebra Expression:
Relational Algebra Tree:
Sample Database: employee
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Previous: From the following table, write a SQL query to find those departments where at least two employees work. Return department id, number of employees.
Next: From the following table, write a SQL query to find those departments where at least two employees work as a SALESMAN in each grade. Return department name, grade and number of employees.
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