title: Create ER diagram from sql file in mysql Workbench
body: <p>I am using <strong>tank_auth</strong> library for authentication in <strong>Codeigniter</strong>. I want to draw ER-diagram for tank_auth sql file. </p>
  
  <p>When I imported sql file (reverse engineering) in mysql workbench it shows all table without  any relationship between tables (users, user_profiles, user_autologin, login_attempts, ci_sessions ).</p>
  
  <p>how could I get Er-diagram from given sql file ?</p>