Abstract: A data searching apparatus for searching a database based on a search criterion entered in a corresponding data-entry field by a user. The data searching apparatus includes a search index recording unit 11, and a management data recording unit 13 that are operable to hold field information indicating one or more of a plurality of data-entry fields that correspond one-to-one with a plurality of search categories structuring the database, and a search category obtaining unit 23, a field display instructing unit 24, and a field display unit 43 that are operable to display the one or more data-entry fields indicated by the held field information, and to hide any of the plurality of data-entry fields not indicated by the held field information. This prevents the searching operations from becoming complicated and troublesome even when the number of search categories is large.

Abstract: A data searching apparatus searches a database of data files for a desired data file, based on a search condition set by a user. Each data file includes a plurality of search keys for providing clues to know data file contents. A receiving unit receives a search condition from the user. A searching unit searches the database for at least one data file that satisfies the search condition received by the receiving unit. An extracting unit extracts a plurality of search keys from the data file that is a search result by the searching unit. The searching unit further searches the database for at least one data file that includes at least one of the search keys extracted by the extracting unit.