多行子查詢
多行比較操作符
innot in
anysom
allin 與 =any 等價
not in 與 <>all 等價
#返回location_id是1400或1700的部門中的所有員工姓名
#1產尋location是1400、1700的部門編號
select
distinct department_id
from departments
where location_id in
(1400
,1700
)select last_name
from
`employees`
where department_id in
(select
distinct department_id
from departments
where location_id in
(1400
,1700))
;
select
distinct salary
from employees
where job_id=
'it_prog'
;select
`employee_id`
,`last_name`
,`job_id`
,`salary`
from
`employees`
where salary<
any(
select
distinct salary
from employees
where job_id=
'it_prog'
)and job_id<>
'it_prog'
;#或者
select
`employee_id`
,`last_name`
,`job_id`
,`salary`
from
`employees`
where salary<
any(
select
max(salary)
#比較from employees
where job_id=
'it_prog'
)and job_id<>
'it_prog'
;
select
`employee_id`
,`last_name`
,`job_id`
,`salary`
from
`employees`
where salary<
all(
select
distinct salary
from employees
where job_id=
'it_prog'
)and job_id<>
'it_prog'
;#或者
select
`employee_id`
,`last_name`
,`job_id`
,`salary`
from
`employees`
where salary<
any(
select
min(salary)
from employees
where job_id=
'it_prog'
)and job_id<>
'it_prog'
;
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