title: How to do a distinct on Azure Application Insights Analytics and then project few variables from the new distinct set
body: <p>I have a query to find out the distinct user Ids and their country, agency name, city code who use a specific product version.
  How do I list the properties successfully?
  Below query doesn't have filter out the unique users.</p>
  
  <p>customEvents
  | where customDimensions.["Product Version"] == "7.4" 
  | where timestamp between(datetime("2018-12-01T00:00:00.000Z")..datetime("2018-12-02T00:00:00.000Z"))
  | project client_CountryOrRegion, user_Id, customDimensions.["Agency Name"], customDimensions.["Pseudo City Code"], customDimensions.["Product Version"]</p>