Keywords: Integrity, secrecy 1. INTRODUCTION Consistency, or data integrity, in databases is usually achieved by associat- ing with each database a set of constraints. The database management system (DBMS) has the responsibility to ensure that these constraints are satisfied by the database state...
An embodiment of the invention provides bi-directional referential integrity constraints. In contrast to prior referential integrity constraints, which provide that for every row in a child table, the value in the foreign key must have a matching primary key value in the parent table, an embodiment...