select a.emp_no,(b.salary-a.salary) growth ##同一行中两列相减即为涨幅 from (select emp_no,salary from salaries ###第三层这里选出在职员工入职时的工资 where from_date in (select hire_date from employees ###第二层选出所有在职员工的入职时间 where emp_no in (select emp_no from salaries ##这里第一层选出所有在职员工的编号 where to_date = '9999-01-01'))) a inner join...