| 摘要 |
<p>A relational database management system in which entities stored in the database are replaced in the relations with coded identifiers (270, 285). Problems are encountered in relational database management when changing data which is correct for some entities but incorrect for others. The present invention solves the problem of referential integrity by extending the use of identifiers so that each relational entity of a relation may reference another relational entity (or row) of the same or different relation. A group of related entities in one row of a relation may be replaced by an identifier in all other relations in which the same entities are grouped in a row. The identifiers replace the entities in all relational database operations.</p> |
