1. A computer program device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform method steps for generating quantitative association rules, the method steps comprising: a) receiving a query including antecedent and consequent attributes where said antecedent and consequent attributes further comprise a plurality of quantitative and categorical attributes; b) organizing a relationship between said antecedent and consequent attributes; c) prestoring data defining the relationship between said antecedent attributes and data related to said consequent attributes; and d) deriving one or more quantitative association rules from prestored data in response to said prestoring step.