Regardless of a final model design, many-to-many relationships open the door to varying options, and the designer should understand why one option arises over another. This choice usually means the ...

Unlike one-to-one or one-to-many relationships, which can be directly implemented in physical database schemas, many-to-many relationships must remain in the abstract, the conceptual, the supernatural ...

they’ll have many brothers and sisters as well. If you’re married, both you and your spouse have a spouse—each other—but only one at a time. Database relationships are very similar in that ...