| 摘要 |
PURPOSE:To access a high level data processing request unconsciously of the complicated relation between records, by adding a relational data base type function to a network data base. CONSTITUTION:A data base of 1-schemer, 1-range, and 1-record type is implemented in a network data base (NDB) and an index is added to the implemented data base. Moreover, a logical record accessing section 14 is installed to the preceding stage of a data base accessing section 8. The accessing section 14 is positioned so that it can be viewed as on application program 4 when it is viewed from the accessing section 8 for realizing record access processing. The accessing section 14 issues an access instruction to the accessing section 8 after the accessing section 14 converts the access instruction into plural NDBs access instructions. |
