DATABASE MANAGEMENT DEVICE, DATABASE MANAGEMENT METHOD AND STORAGE MEDIUM THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a database management device, a management method, and a storage medium wherein the object data in database can be searched for in a short time while exchanging can be smoothly executed between the data whose effective period expires and the following data. SOLUTION: The database management device, the management method, and the storage medium comprise a relevant information adding means for adding relevant information mutually associated with the data to both or either one of a specific data of whose effective period expires and/or the following data corresponding to the specific data.