I am tryping to 'sum' the numerical values from Activity::Time for each of the different values in Activity::Activity (eg. "Leave"). The summed field is in the related parent field: Date::Leave. The relationship is: (DATE) __uuID = Activity::_Date_uuID.
I had thought to make 'Date::Leave' a calc field using the syntax:
__uuID = Activity::_Date_uuID and Activity::Activity = "Leave";
However, this fails to present correct data.