oracle之高級子查詢1

--子查詢 查詢last_name爲chen的manager信息


select employee_id,last_name
from employees
where employee_id=(
select manager_id
from employees
where last_name='Chen'
)

運行結果

--查詢
select employee_id,manager_id,department_id
from employees
where manager_id in(
select manager_id
from employees
where employee_id in(141,147)
)
and department_id in(
select department_id
from employees
where employee_id in(141,147)

)
and employee_id not in(141,174)

運行結果

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