title: Finding employees who are not managers
body: <p>I have a table where we have staff_id and manager_id. Attached screenshot.</p>
  
  <p>I found managers by using this query:</p>
  
  <pre><code>select e.first_name as employee , m.first_name as manager
  from sales.staffs E
  inner JOIN sales.staffs M ON M.staff_id = E.manager_id
  </code></pre>
  
  <p>How do I pull a list of employees who are not managers?</p>
  
  <p>My sample table</p>
  
  <p><img src="https://i.stack.imgur.com/nWO3F.png" alt="My sample table"></p>