title: Query to display employees with lowest salary from each department
body: <p>I want to display the lowest earning employees of each department based on <code>salary</code> using <code>min()</code>.</p>
  <p>I have tables of employees with <code>id, first name, last name, department id, salary</code>
  and departments, <code>department_id, name</code> department id from 1 to 5.</p>
  <p>I am having trouble doing this, I only know how to start
  <code>SELECT name, surname from employees WHERE...</code></p>