| 摘要 |
PROBLEM TO BE SOLVED: To appropriately extract data corresponding to data designated in a query from a database storing data in which data obtained from a plurality of data sources is integrated.SOLUTION: A data extraction method acquires a query including a plurality of attribute values about a first attribute, identifies a record including an attribute value which matches one of the plurality of attribute values from a database storing the record to be searched, groups the identified record so that the records whose attribute are the same as the attribute value which matches one of the plurality of attribute values belong to the same group, identifies at least one set of records obtained by grouping, and includes processing for outputting a search result including the record included in the identified set or identification information of the record. |
