DATA SEARCH DEVICE, DATA SEARCH SYSTEM, DATA SEARCH METHOD AND DATA SEARCH PROGRAM

摘要

PROBLEM TO BE SOLVED: To easily search information constituted of each attribute information for individually managing a change history.SOLUTION: A data search device 10 obtains, from a plurality of history tables 22 in which the change history of attribute information relating to the data of a main table 21 and a valid period as a period in which each changed attribute information is valid are stored in association, the attribute information and the change history, and creates a table in which the attribute information whose valid periods are common are stored in association. Then, the data search device 10 creates graph data expressing a relation between the attribute information in a predetermined period by using the created table. Then, the data search device 10 performs data search by using a search query to the created graph data.