Получение текущих зарплат всех сотрудников, кроме менеджеров

CREATE TABLE `dept_emp` (
`emp_no` int(11) NOT NULL,
`dept_no` char(4) NOT NULL,
`from_date` date NOT NULL,
`to_date` date NOT NULL,
PRIMARY KEY (`emp_no`,`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 `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`)
);
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 dept_no, e.emp_no, salary FROM (SELECT * FROM employees WHERE emp_no NOT IN (SELECT emp_no FROM dept_manager)) AS e JOIN salaries s ON e.emp_no = s.emp_no AND s.to_date = '9999-01-01' JOIN dept_emp de ON e.emp_no = de.emp_no

SELECT emp_no FROM dept_manager

SELECT * FROM employees WHERE emp_no NOT IN (SELECT emp_no FROM dept_manager)