SELECT salary FROM employees ORDER BY salary DESC;
SELECT DISTINCT salary FROM employees ORDER BY salary DESC;
SELECT job_id, salary FROM employees ORDER BY job_id, salary DESC;
SELECT DISTINCT job_id, salary FROM employees ORDER BY job_id, salary DESC;
SELECT DISTINCT phone_number FROM employees;
SELECT * FROM countries;
SELECT * FROM departments;
SELECT * FROM dependents;
SELECT * FROM employees;
SELECT * FROM jobs;
SELECT * FROM locations;
SELECT * FROM regions;
