| 摘要 |
In a client/server network system, an updated database content is automatically notified from the server computer to all of client computers which have once accessed this database content. In the server computer, an access history record for recording access requests issued from certain client computers is saved in a merchandise information database. When the record of this merchandise information database is changed, the server computer extracts such a client computer which has accessed this database in the past based up on the access history. Then, the server computer notifies a change notification to all of the relevant client computers, so that all of these relevant client computers can recognize the changed database.
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