--睡得工资比abel高
select last_name,salary
from employees
where salary>(select salary
from employees
where last_name='Abel')

运行结果

--返回job_id 与141号员工相同 salary比143号多
select last_name,job_id,salary 
from employees
where job_id=(select job_id from employees where employee_id=141
)
and salary>(select salary from employeeswhere employee_id =143
)

运行结果

--返回工资最少的员工
select last_name,job_id,salary
from employees
where salary=(
select min(salary) from employees
)

运行结果

--茶语最低工资大于50号最低工资的部门id和工资
select department_id,min(salary)
from employees
group by department_id
having min(salary)>(
select min(salary) from employees where department_id=50)

运行结果