Data selection system and data selection method

A data selection system configured to select data of an application table for use in an application capable of executing predetermined processing based on a plurality of tables in a predetermined object, the data selection system comprising:

• a processor unit;
• and
• a storage unit connected to the processor unit,
• wherein the storage unit stores a first catalog group including a plurality of catalogs indicating column configurations of a plurality of tables in a first object, a second catalog group including a plurality of catalogs indicating column configurations of a plurality of tables in a second object, and first correspondence information indicating correspondences of columns of a plurality of catalogs that associate columns between a target table of the first object and the application table, and
• the processor unit
• identifies an unconnected catalog for which a catalog of the second object having an identical correspondence does not exist among the plurality of catalogs of the first object included in the first correspondence information based on the first correspondence information and the second catalog group,
• identifies an unconnected correspondence, which is a correspondence of the unconnected catalog in the first correspondence information, and an identical path correspondence which is a correspondence of a catalog on a path including the unconnected catalog among a plurality of catalogs that connect the columns between the target table of the first object and the application table, and
• displays information of the unconnected correspondence and information of the identical path correspondence.