DATA MANAGING METHOD, ITS DEVICE AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a data managing device capable of retrieving data at high speed from the data at a point of time where the contents of data constituted of plural items stored in time series is changed. SOLUTION: A main control part 1 receives a retrieval request accepted by an input device 3 via an input/output control part 6. The main control part 1 specifies a record to be retrieved by reading a synthetic change bit from a synthetic index file 24 of an item to be retrieved according to a position where retrieval is started and the retrieving direction, Information corresponding to the specified record is read from the data file 21 and notified to an operator by a display device 4 or an output device 5.