title: Parse.com data design for Group by queries
body: <p>Need some help with data design</p>
  
  <p>I have a class called printers and they have an organization number. I also have another class called buildings. printers can be grouped under buildings. I also have users who belong to organization. so currently the following data structure</p>
  
  <pre><code>Organization name, organization number 
  Building Name, building location, organization number 
  Printer, printer details, organization number, building 
  User, user name, organization number 
  Message, messageID, urgency, pointer to printer
  </code></pre>
  
  <p>Users belong to an organization. Buildings also belong to an organization. <br>
  What is the best way for the following scenario -<br>
  <b>  When a user logs in, he sees all his buildings with an icon showing red if any of the printers have urgent messages. Selecting a building will show him all printers.</b></p>
  
  <p>Do i need to make multiple parse queries?</p>