Let's assume one create a report over 10 days with a daily granularity
(dates) to filter in 3 specific products (correlation) sold within 2
different campaigns (dimension). Although, one don't want to see each
product quoted 1 x 2 (each campaign) x 10 days, but just the total
number of units for these 3 products alltogether, by campaign by days.
As of now, the sub-total once enabled would sum up all the campaigns and
all he products together, showing only an overall number per day. It
would then...