Referential integrity helps manage data by enforcing validation between related entities. This enforcement follows logical semantics behind the database design -- i.e., an employee can only work for ...

It often seems that working around things is a full-time task in every area of information technology. When workarounds are conceived and deployed, people are not always in agreement. Beyond ...

A database management safeguard that ensures every foreign key matches a primary key. For example, customer numbers in a customer file are the primary keys, and customer numbers in the order file are ...