I'm a recent college grad and I'm building a database for my family business, which is a writing instrument manufacturer. I learnt about the concepts of subtype and supertype, but my professor told us that he almost never use subtype and supertype, instead he would do something else just for performance reasons. Can any expert here please tell me how should I go about subtype and supertype. I'm totally lost as to how to actually implement it. Thanks in advance
Jump to Post
what do you mean by subtype/supertype. Does this deal with the concept of Generalization/Specialization of extended entity relationship model? you may state an example.
If your professor suggest doing something else just for performance reasons at that very early design stage, you may change professors.
Jump to Post
sorry, it has never been my intention to discredit your prof. My given statement sounds kind of sloppy.
Your subtype/supertype is exactly that what I meant with the extension of entity relationship model Generalization/Specialization. Supertype is equivalent to generalization and subtype to specialization.
As for …
All 5 Replies
We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, learning, and sharing knowledge.