| 摘要 |
PROBLEM TO BE SOLVED: To provide a data management method for expanding a schema by improving a data expression method using a plurality of record lookup tables. SOLUTION: The data management method for registering data having fields and values by using a physical schema 107 and a logical schema 102 corresponding to the physical schema 107. The physical schema 107 is configured so that one or more records are allocated according to one record of the logical schema 102 and is provided with at least a field corresponding to a main key of the logical schema 102 and a field of a record number. When there is no empty field in the physical schema 107 in expanding the logical schema 102, a new record is prepared, a value of the field corresponding to the main key of the logical schema 102 is set as it is without changing it, the value of the record number is incremented, the incremented value is set in the field of the record number, and data are set in the other field. COPYRIGHT: (C)2009,JPO&INPIT
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