| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of matchings in extracting a record system matching to a plurality of ordered retrieval conditions. SOLUTION: The method includes: a step of imparting a flag to each item value of a specific item and storing it as flag definition data on the basis of a retrieval designation in which a specific value is designated as to each specific item and the plurality of ordered retrieval conditions are included; a step of sorting out a plurality of records to be retrieved according to a prescribed rule; a step of specifying a flat corresponding to an item value of the specific item in a record related to processing by using the flag definition data in order of the plurality of records after sorting; a step of determining if a manner of appearance of the flag specified in the step of specifying flags in order of the plurality of records after sorting out follows the retrieval designation; and a step of outputting data on the record related to the flag included in the manner of appearance of the flag when it is determined that the manner of appearance of the flag follows the retrieval designation. COPYRIGHT: (C)2008,JPO&INPIT
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