| 摘要 |
PROBLEM TO BE SOLVED: To provide a database structure facilitating the designing of tables. SOLUTION: A category table 110 stores a category ID 111 and a category name 112. An item table 120 stores an ID corresponding to the category ID 111 of the category table into a category ID 121. For at least one of the objects designated by the category ID, a material data table 130 stores data on each item while the object is associated with the object ID designating the object and the item ID. COPYRIGHT: (C)2004,JPO
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