In a relational database ... as a foreign key to the CustomerOrderTable within the structure. If the primary key from the OrderedItemTable was defined as a composite (of the OrderID column plus ...

Using relational databases that link tables using primary and foreign keys helps to avoid issues like insertion, deletion and update anomalies. In a relational database, it is necessary to define ...

Occasionally one sees an entity-relationship diagram (ERD) having an unusual characteristic ... And keep in mind, any DBMS will have a physical limit on the number of foreign key references defined on ...