DATA BASE CONTROLLER
    13.
    发明专利

    公开(公告)号:JPH0877044A

    公开(公告)日:1996-03-22

    申请号:JP21441294

    申请日:1994-09-08

    Applicant: SONY CORP

    Inventor: ENOMOTO MASASHI

    Abstract: PURPOSE: To prevent the retrieval process speed of data from decreasing by compressing data stored in a data base in record units, expanding them in a memory, and retrieving the data stored in the memory at a request from an application. CONSTITUTION: The data in the data base stored on a hard disk 2 are compressed in record units and expanded in the memory 3. Then the data stored in the memory 3 are retrieved at the request from the application. Therefore, even when the data base is large in volume, the whole data base can be stored in the memory 3 or even if the whole data base can not be stored in the memory 3, the frequency of swapping can be decreased; and further the compressed data base in the memory 3 can be discriminated, so the retrieval process speed of the data can be prevented from decreasing.

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