Specify the type of statistics history rows that you want to delete for the index.
Specifies that you want to delete all specified statistics history rows older than a certain number of days for the index from all catalog history tables.
Specify an age in days. Any statistics history rows related to the specified index that are older than the specified number of days are deleted. The default is 90 days. Only available when Older than (in days) is selected for the index.
Specifies that you want to delete all specified statistics history rows gathered before a certain date for the index from all catalog history tables.
Specify a date. Any statistics history records related to the specified index that were created prior to the specified date are deleted. The default is today's date. Only available when Written before is specified for the index.
Specifies that you want to delete all specified statistics history records regardless of their age for the index from all catalog history tables.