Higher; Introducing databases Primary and foreign keys. Using flat file databases can lead to insertion, deletion and update anomalies. Use of relational databases where primary and foreign keys ...

For everyone normalizing their designs, just remember: There ain't no such thing as a partial foreign key. When a project pretends that partial foreign keys are a valid concept, the end result is a ...

Retaining an infinitude of Foreign Keys may cause future performance bottlenecks as transactional volume will get a performance hit by maintaining all those foreign keys and the indexes behind them.

For National 5 Computing Science, revise the use of primary and foreign keys and the difference between flat file and relational databases.