Multiple aggregation groups, which can be multiple partitions in an aggregated data table, are formed. Each group includes multiple aggregation records; each aggregation record includes an aggregation of values contained by a different subset of multiple database records. While an aggregation group is...http://www.google.com/patents/US7149736?utm_source=gb-gplus-sharePatent US7149736 - Maintaining time-sorted aggregation records representing aggregations of values from multiple database records using multiple partitions
