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10.获取所有非manager的员工emp_no.md 675 Bytes
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xuthus authored 2019-08-13 08:38 . revise:content revision

获取所有非manager的员工emp_no

题目描述

获取所有非manager的员工emp_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 `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));

答案

select e.emp_no from employees e where e.emp_no not in (select emp_no from dept_manager)

题解

将属于manager的所有员工过滤

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