DATABASE SYSTEM, DATA COUPLING METHOD, INTEGRATING SERVER, DATA COUPLING PROGRAM, DATABASE SYSTEM SHARING METHOD AND DATABASE SYSTEM SHARING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a database system and the like capable of executing coupling processing of pieces of data between different database systems at higher speed.;SOLUTION: The database system includes a plurality of database systems and an integration server. The integration server makes an inquiry to first and second database systems on the basis of a request to couple pieces of data. The first and second database systems respectively convert the pieces of data into hash values. The first database system transmits the hash value to the second database system. The second database system compares the received hash value with the converted hash value, transmits the comparison result and the original data of the matched hash value to the integration server and transmits matched hash value information to the first database system. The first database system transmits the data to the integration server on the basis of the hash value information. The integration server couples the pieces of data on the basis of the comparison result.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT