The ORM Foundation

Thank you for such a detailed answer. I've been studying Database Design for the last 3 months and 9 weeks of it has been EERD, in the last 4 weeks they introduced ORM. Our assement is to compare both methods for an imaginary project which we had to produce originally in EERD format with a few queries thrown in for ...

I'm converting an EERD diagram to ORM and have a couple of questions to how some fact types should be displayed. If a value to an entity is to be derived, then should it still show the dot on the entity side as a mandatory required field. I have an age value but it won't be stored, it will be calculated from DOB. In EERD ...