Counts surviving activity rows as of the cutoff — a generic point-in-time aggregate (e.g. activity_count_asof). Only rows at-or-before the cutoff are counted, preventing future leakage.
activity_count_asof
candidate dated rows
the resolved cutoff, or null for no filtering
null
Counts surviving activity rows as of the cutoff — a generic point-in-time aggregate (e.g.
activity_count_asof). Only rows at-or-before the cutoff are counted, preventing future leakage.