A system, method and computer readable medium for sampling data from a relational database are disclosed, where an information processing system chooses rows from a table in a relational database for sampling, wherein data values are arranged into rows, rows are arranged into pages, and pages are arranged...http://www.google.fr/patents/US6993516?utm_source=gb-gplus-shareBrevet US6993516 - Efficient sampling of a relational database
