In a relational database approach, regardless of whether one is considering persisted data or transitory query results, almost everything is viewed as a logical table. Associations between these ...

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 ...