# active subscriptions belonging to these relationship id's= ???
I cannot solve the problem of calculating the total # active subscriptions belonging to the inflow relationship ID's. Thus, if a relationship has a new inflow subscription in a certain week I need to count all the subscriptions that this specific relationship has (new inflow ids but also older already existing ones).
relationship x has a new inflow subscription in week y, namely subscription A. But relationship X is already active with 2 other subscriptions, namely subscription B and subscription C.