Discuss the difference between a composite key and a composite attribute. How would each be indicated in an ERD?
Answer to relevant QuestionsWhat is a derived attribute? Give an example.Write the ten cardinalities that are appropriate for this ERD.Describe precisely the composition of the DEPENDENT weak entity’s primary key. Use proper terminology in your answer.Using the Crow’s Foot methodology, create an ERD that can be implemented for a medical clinic, using at least the following business rules:a. A patient can make many appointments with one or more doctors in the clinic, and ...Under what circumstances are composite primary keys appropriate?
Post your question