| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that it is unable to obtain the present value of data of a basic database from a data warehouse since data of the data warehouse is older than the data of the basic database in a method using a batch when desiring to refer to the value of present data of the basic database in analytical business. SOLUTION: This data warehouse system is provided with an operational data store 102, an instant data extracting step for extracting the data in real time from the basic database 104, and an instant data reflecting step for storing the data extracted by the instant data extracting step in the operational data store.
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