CSE 480 Midterm: CSE 480 MSU Exam 2018 version b Exam
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Answer the questions in the spaces provided on the page. If you run out of room for an answer, continue on the back of that page. Above is a relation with columns named after greek letters. Using the values in the relation, ll-in the bubbles of the dependencies that are valid. 50 points (a) (20 points) which of the following are true given this functional dependency holds: Form. (cid:13) 4nf ensures faster (or equivalent) database performance than third nor- mal form. Below is an e/r diagram representing information about companies and embassies. (a) (40 points) write a relational database schema representing the e/r diagram. Use the nulls method to create relations for the subclasses. (b) (10 points) you have just been tasked with adding a new feature to the above diagram, corporate taxes. Alter the diagram above to allow the database to track the tax rate di erent companies face in each of the multiple countries they operate in.