installation aggregate NXQL (classic)

Name	Type	Operating systems	Properties
number_of_packages	integer	Windows | macOS
	Number of packages
number_of_devices	integer	Windows | macOS
	Number of devices
activity_start_time	datetime	Windows | macOS	NU
	Start time of investigated activity
activity_stop_time	datetime	Windows | macOS	NU
	Stop time of investigated activity
number_of_installations	integer	Windows | macOS
	Number of installations
number_of_events	integer	Windows | macOS	NU
	Number of events