--查询对应的列 大于5000
select employee_id,last_name,salary from employees
where salary>5000
运行结果 --查询对应的日期
select last_name,hire_date from employees where hire_date7-6月-1994
--查询对应的日期
select last_name,hire_date from employees
--wh…
--睡得工资比abel高
select last_name,salary
from employees
where salary>(select salary
from employees
where last_nameAbel)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…