title: Azure-DocumentDb: Top1 in Group BY Query
body: <p>I am using DocumentDB to store User's data for Analytics purpose. In my Collection, I will have 10-15 Rows per day per User with respective timestamps in UTC.</p>
  
  <p>I want to write a Query to show Data to the Admin, to select the Last Record For Each User for each and every day, with adjustment of Admin's TimeZone.</p>
  
  <p>Anu Suggestions on, how should I be storing my Records to make the Query Faster or any suggestions on how should i form my query ?</p>