| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform effective marketing according to the preferences of many and unspecified customers. SOLUTION: A first database, which has at least ID assigned to different kinds of commodities and search data that are whole or a part of information on the commodities, and a second database, which has data that includes purchase histories for every customer, who purchased contents, are provided. In this invention, the following steps are performed: inputting a predetermined information related to customer requests; searching ID of a commodity related to the predetermined information, which is inputted at the above-described step, referring to the search data from the first database; and determining whole or a part of customers, who have purchase histories of commodities that have the searched ID, referring to the second database.</p> |
