A database query compiler and compilation method has special facilities for compiling a query that includes a Rows Since sequence function, Rows Since (search condition). A query normalizer includes a Rows Since function normalizer for normalizing the Rows Since sequence function. The Rows Since function...http://www.google.de/patents/US6289336?utm_source=gb-gplus-sharePatent US6289336 - System and method for computing rows since sequence function in a database system
