title: Group chat database design
body: <p>I have 3 tables for different types of users..</p>
  
  <pre><code>Admin - Admin_id, Admin_name
  User - User_id, User_Name
  Employer - Emp_Id, Emp_Name..
  </code></pre>
  
  <p>Now I want to have group chat database design between all of them.
  How can I fetch message from the following : 
  In 1 group there can be only 1 user, 1 employer and 1 Admin</p>
  
  <p>Currently I have 1 to 1 chat design, which is as follows:</p>
  
  <pre><code>Id, message, from_user, to_user, from_usertype, to_usertype, datetime
  </code></pre>
  
  <p>Can anyone help ?</p>