| 摘要 |
PROBLEM TO BE SOLVED: To reduce burdon on a database server.SOLUTION: A database server 3 includes a memory device 35 which memorizes a storing data D in which a key that is commonly referenced by a plurality of reference devices 1 is associated with a target data Dk which is related to the key and corresponds to a plurality of pieces of reference partial data which each reference device 1 can extract, and control means for outputting the target data Dk that is associated with the key inputted from the reference device 1. The reference device 1 includes extraction means 12 which extracts reference data R that can be extracted by the reference device 1 from the target data Dk obtained from the database server 3. |
