Method to retain an inherent and indelible item value in a relational database management system

摘要

A data processing apparatus, a data processing method, and a data processing program for use in a data processing system is provided, the system including the data processing apparatus which includes an RDBMS storing information shared among a plurality of organizations and a business application execution apparatus which is employed when either one of the organizations uses the information stored in the RDBMS of the data processing apparatus and which is communicably connected to the data processing apparatus. An inherent item table managed by the data processing apparatus is kept unchanged even if an organization is added.