Hi, I need help with this scenario. We have a table of events which has columns date, event (not important for this discussion), and user_id. It is obviously easy to find number of unique users for each day. I also need to find number of unique users in the last 30 days for each day. This is also quite simple to do for one day. However, I cannot figure out how to do this for a range of days. Something like this is pretty straightforward in most RDBMS but with HiveQL has I'm finding this hard. I might be missing something simple though. Any help is appreciated. Ideally the query should also be as optimized as possible as this table could be huge.
Thanks, Vijay
