13. The apparatus of claim 12 , wherein the optimal temporal hierarchy is used to materialize pre-computed results that are used to accelerate a response time to a query workload in the presence of newly inserted database records.
13. The apparatus of claim 12 , wherein the optimal temporal hierarchy is used to materialize pre-computed results that are used to accelerate a response time to a query workload in the presence of newly inserted database records. 15. The apparatus of claim 13 , wherein the query workload requests aggregation statistics over a specified sliding window.