| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an information retrieval device, an information retrieval method and a program capable of performing information retrieval for any data file in the same way even when how to hold information varies according to each data file. <P>SOLUTION: A virtual DB is created from a high-capacity storage device 5 storing a career file 51 and an additional post history file dependent on the career file 51, a data table for retrieval in which records having the same date in the virtual DB are grouped together into one record is created, and data corresponding to an input retrieval condition is retrieved from the data table for retrieval. <P>COPYRIGHT: (C)2012,JPO&INPIT |
