查找各个部门当前(to_date='9999-01-01')领导当前薪水详情以及其对应部门编号

查找各个部门当前(to_date=’9999-01-01’)领导当前薪水详情以及其对应部门编号dept_no

CREATE TABLE

dept_manager

(

dept_no

char(4) NOT NULL,

emp_no

int(11) NOT NULL,

from_date

date NOT NULL,

to_date

date NOT NULL,

PRIMARY KEY (

emp_no

,

dept_no

));

CREATE TABLE

salaries

(

emp_no

int(11) NOT NULL,

salary

int(11) NOT NULL,

from_date

date NOT NULL,

to_date

date NOT NULL,

PRIMARY KEY (

emp_no

,

from_date

));

select salaries.emp_no,salaries.salary,salaries.from_date,salaries.to_date,dept_manager.dept_no
from salaries inner join dept_manager
on dept_manager.emp_no = salaries.emp_no
and dept_manager.to_date = '9999-01-01'
and salaries.to_date = '9999-01-01';

SELECT s.*, d.dept_no FROM salaries s ,  dept_manager d

WHERE s.to_date='9999-01-01'

AND d.to_date='9999-01-01'

AND s.emp_no = d.emp_no;