You can use this command to delete all hardware inventory history data older than the number of days specified. SMS then deletes the specified objects from the SMS site database at the selected site. Only the latest inventory data is left in the SMS site database. Site databases at other sites are not affected.
Defaults Delete hardware inventory data older than 90 days; runs on Saturday.For more information about hardware inventory, see Collecting Hardware Inventory Overview.
Schedule a Delete Data Task
Maintaining a Site Database Overview