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
As far as I know, Hive has no built-in support for sliding-window analytics.
There is an enhancement request here:
https://issues.apache.org/jira/browse/HIVE-896
https://issues.apache.org/jira/browse/HIVE-896Without such support, the
brute force way of doing things is,
SELECT COUNT(DISTINCT
