title: Referencing Table & Referenced Table
body: <p>I'm trying to understand relationships and naturally questions appear.</p>
  
  <p><img src="https://i.stack.imgur.com/Vapoa.png" alt="MySQL Workbench screenshot"></p>
  
  <p>What does referencing table mean and what does referenced table mean? In the above example which one should be referenced and which one referencing?
  Lets say for the sake of argument that the <code>settlements</code> table is a child table (settlement cannot exist without a country). Should this child table be referencing or referenced?</p>
  
  <p>I prefer not to open a new question for such a little question:
  What does that <code>Mandatory</code> checkbox mean? Does it mean that the settlements table is required or that <code>country_id</code> is required? Or maybe something else?</p>