| 摘要 |
A data management method of obtaining accurately the number of data satisfying a retrieval condition and the number of data not satisfying a retrieval condition is employed in a data management apparatus including: a storage device storing a plurality of data, each data having an attribute and an attribute value associated with each attribute; a display device; a control circuit for displaying on the display device a region for each attribute value of a certain attribute and a plurality of icons representing the plurality of data, respectively, on each region; and a circuit to retrieve data by a filter to which an attribute and an attribute value are related. The data management method includes the steps of displaying the plurality of icons on a region provided for every attribute value as to a certain attribute; generating a filter overlapping the region; moving or modifying the configuration of the filter on the region arbitrarily; entering a retrieval condition as to an attribute and an attribute value related to the filter; detecting whether the region has an overlapping section with the filter; and detecting data that meets the retrieval condition when the region has an overlapping section with the filter.
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