Ray Henry is considering expanding the inventory at his book stores to include movie DVD...

Ray Henry is considering expanding the inventory at his book stores to include movie DVDs. He has some special ideas for how he wants to implement this change, and he needs you to help with database design activities. In each exercise, represent your answer in DBDL and with a diagram. You may use any of the styles presented in this chapter for the diagram.

Expand the database design you created in Exercise 1 and modified in Exercise 2 so that it will also support the following situation: Ray wants to store information about the DVDs the club owns. When the club purchases a DVD, Ray assigns it a number. Along with the number, he stores the number of the movie on the DVD, the date the DVD was purchased, the number of times it has been rented, and the number of the member who is currently renting it. (If the DVD is not currently being rented, the member number will be null.) Ray also needs to store the number of the branch to which the DVD is assigned. Finally, Ray would like to store the history of the rental of each particular DVD. In particular, he needs to store the DVD number, date of the rental, date it was returned, and number of the member who rented the DVD. Assume a DVD could potentially be rented more than once on the same day. (Hint: Review the discussion of the categories of primary keys to determine what type of primary key would be appropriate for this relation.)