title: Entity Relationships: Difference between solid line and dotted line
body: <p>In the use of table relationship. What is  the difference in the use of solid line and dotted line?</p>
  
  <p>For Example</p>
  
  <p>TABLE : MESSAGES /
  TABLE : USERS</p>
  
  <p>An User have 0 or Many Messages.</p>
  
  <p>Solid line or Dotted Line?</p>