SELECT last_name,department_name
FROM employees e,departments d;
WHERE e.department_id = d.department_id;
SELECT * FROM employees;
SELECT e.employee_id,e.last_name,d.department_name,l.city
FROM employees e,departments d,locations l
WHERE e.department_id = d.department_id
AND d.location_id = l.location_id;
SELECT * FROM job_grades;
SELECT last_name,salary,grade_level
FROM employees,job_grades
WHERE employees.salary
BETWEEN job_grades.lowest_sal
AND job_grades.highest_sal;
SELECT last_name,salary,grade_level
FROM employees,job_grades
WHERE employees.salary >= job_grades.lowest_sal
AND employees.salary <= job_grades.highest_sal;
SELECT * FROM employees;
SELECT emp.employee_id,emp.last_name,mgr.employee_id,mgr.last_name
FROM employees emp,employees mgr
WHERE emp.manager_id = mgr.employee_id;