| 摘要 |
PROBLEM TO BE SOLVED: To provide a database management system reducing an usage amount of the memory of an entire database system by performing reusing and sharing of a retrieval result and improving the performance of the retrieval.SOLUTION: The database system is configured by connecting, via a network, a database for storing data; and a data management device. The database management device comprises: enquiry processing means 10 for extracting a retrieval condition and a sort condition by analyzing a retrieval content obtained from an application using the database and for determining processing to be executed; and data management means 20 for preparing at least one ordered set configured by the data stored in the data base according to the determination of the enquiry processing means 10, and for managing, in association with the ordered set, a subset configured by sharing the data overlapped between the sets of the data satisfying the retrieval condition and a sort order of the data according to the sort condition.SELECTED DRAWING: Figure 1 |
