1. 查詢和Zlotkey相同部門的員工姓名和雇用日期 a) select last_name,hire_date b) from employees c) where department_id = ( d) select department_id e) from employees f) where last_name = 'Zlotkey' g) ) h) and last_name <> 'Zlotkey' 2. 查詢工資比公司平均工資高的員工的員工號，姓名和工資。 a) select last_name,employee_id,salary b) from employees c) where salary > (select avg(salary) d) from employees) 3. 查詢各部門中工資比本部門平均工資高的員工的員工號, 姓名和工資 a) select employee_id,last_name,salary b) from employees e1 c) where salary > ( d) select avg(salary) e) from employees e2 f) where e1.department_id = e2.department_id g) group by department_id h) ) 4. 查詢和姓名中包含字母u的員工在相同部門的員工的員工號和姓名 a) select employee_id,last_name b) from employees c) where department_id in ( d) select department_id e) from employees f) where last_name like '%u%' g) ) h) and last_name not like '%u%' 5. 查詢在部門的location_id為1700的部門工作的員工的員工號 select employee_id from employees where department_id in (select department_idfrom departmentswhere location_id = 1700) 6.查詢管理者是King的員工姓名和工資 select last_name,salary from employees where manager_id in (select employee_idfrom employeeswhere last_name = 'King')

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