Database management device, database management method and storage medium therefor

摘要

The invention has an object to provide a database management device, a management method, and the storage medium wherein data to be an object of searching in database can be searched in a short time while the exchanging can be smoothly executed between the data of which effective period expires and the data to be the following data. The database management device, the management method, and the storage medium comprise the relevant information adding means for adding relevant information mutually associated with the data to both or either one of a specific data of which effective period expires and/or a following data corresponding to the specific data.