title: Firebase firestore pricing for querying
body: <p>Assume that i have 20 documents in a collection, and each document has a field that contains the number of views for querying. Example below </p>
  
  <pre><code>collection
       |_document
               |_views: 100
       |_document
               |_views: 600
       |_document
               |_views: 10
  </code></pre>
  
  <p>Later i query the documents to return top 5 highest views. Now my question is, will i be charged for 20 document reads or 5 document reads</p>