title: Multiple condition for Firebase query
body: <p>I have this code for read data from Firebase with condition, but I need multiple condition. I need one more condition for read. I don't know how to do it, I founded it isn't supported, but I need it. Can me help anyone how to do it?</p>
  
  <pre><code>ref?.queryOrdered(byChild: "project").queryEqual(toValue: "inbox").observe(.value, with: { (snapshot:FIRDataSnapshot) in
          var newTasks = [Task]()
  
          for sweet in snapshot.children {
              let sweetObject = Task(snapshot: sweet as! FIRDataSnapshot)
              newSweets.append(sweetObject)
          }
  
          self.tasks = newTasks
          self.tableView.reloadData()
  
      }) { (error:Error) -&gt; Void in
          print(error.localizedDescription)
      }
  </code></pre>
  
  <p>Data in firebase:</p>
  
  <p><img src="https://i.stack.imgur.com/m4lZb.png" alt="data in firebase"></p>