[打卡]asdfgh
2024-04-10 15:19:27
0
125
SELECT * from job_grades;
SELECT last_name,salary,grade_level
from employees e,job_grades j
WHERE e.salary
BETWEEN j.lowest_sal
AND j.highest_sal;
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;
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