Cumulative total of users with activity date
I need want to see how many active users we have over time. I have a field "last_activity_at", if it has a value (not null) they are active. And I want to add the sum total of active dates in the week they fall.
I was able to accomplish this somewhat in beast most, but I think I need to use etl to filter out duplicate weeks...
THEN 'Is null'
ELSE SUM(SUM(1)) OVER (ORDER BY (DATE_FORMAT(`last_activity_at`,'%Y-%m-%d')))