题目描述

查找当前薪水详情以及部门编号dept_no

表结构

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`));

SQL语句

select s.*,d.dept_no from salaries as s,dept_manager as d where s.to_date = '9999-01-01' and d.to_date = '9999-01-01' and s.emp_no = d.emp_no;>gt;nbsp;