Patent ID: 7599910

Claim:
A data processing method for accessing a database data based on query inputs and processing data from the database in data processing system having storage devices that includes a plurality of data storage areas to configure the databases to store data therein, the method comprising: storing correspondence of a plurality of key ranges previously determined to a plurality of the data storage areas in the storage device; storing the data in the data storage area corresponding to the key range contained the data therein when the data is stored in the database; making correspondence information about the key range to the data storage area according to an acceptance of a request including the information about the key range to add and information about the data storage areas; copying data corresponding to the information about the key range to add stored in the other data storage area from said other data storage area to the data storage area corresponding to the information of said key range; analyzing a database calculation request according to the query inputs of the database calculation request; obtaining the information about the key range corresponding to the database calculation request; and accessing the data storage area corresponding to the information of the key range to refer to the data stored in the data storage area accessed and to process the database calculation request.