1. SELECT Last_Name, Hire_Date  
FROM employees  
WHERE Department_id =  
( SELECT Department_id  
FROM employees  
WHERE Last_Name = 'Zlotkey')  
AND Last_Name <> 'Zlotkey'


2. SELECT Employee_Id, Last_Name , Salary
FROM employees  
WHERE Salary > 
(SELECT AVG (Salary)  
FROM employees )
ORDER BY Salary ASC

3. SELECT last_name, salary
FROM employees
WHERE manager_id = 
(SELECT employee_id
FROM employees
WHERE last_name = 'King')

4. SELECT Employee_Id, Last_Name, Salary
FROM employees
WHERE department_id IN (SELECT Department_id
FROM employees
WHERE Last_Name like '%u%')
AND Salary > (SELECT AVG(Salary)
FROM employees)