A relational database method and apparatus includes a database that is divided into multiple data segments, each of which may be independently stored on one of a variety of storage devices. As data from the relational database is being loaded, the number of data segments will increase. A range index...http://www.google.com.hk/patents/US6049804?utm_source=gb-gplus-share專利 US6049804 - Method and apparatus for segmenting a database