| 摘要 |
PURPOSE:To make access to the record only by set of two records and n assumption records by specifying the owner record and the member record during access time and designating the point of the indication word. CONSTITUTION:In order to make easy the access for designating the member record R8 based on the owner record R1, correspondence comprising the first connecting structure including the assumption set 2 corresponding the owner record R1 to the first assumption record, the second connecting structure including the assumption record, and a connecting structure including the assumption set 1 having the second assumption record and the member record R3 is carried out and the indication words of the first, the second ... assumption records are designated, thereby the record (data group) present on the data base can be efficiently extracted in accordance with a point of view given during the time of access. |
