Question

This assignment allows students to demonstrate their skills in the area of designing relational databases to satisfy specific business rules and requirements. The deliverables for this assignment include an Entity Relationship Diagram and detailed documentation describing the database design and structure. In this assignment you will be provided with a description of an application (below) to create an entityrelationship diagram (ERD) and design accompanying table layout using sound relational modeling concepts and practices. The relationships between the entities and the attributes for the entities will be identified and described. This database will provide the foundation for the follow-on assignment. The following paragraphs provide the background and summary of the business requirements. You are a database consultant with Ace Software, Inc. and have been assigned to develop a database for the Mom and Pop Johnson video store in town. Mom and Pop have been keeping their records of videos and DVDs purchased from distributors and rented to customers in stacks of invoices and piles of rental forms for years. They have finally decided to automate their record keeping with a relational database. You sit down with Mom and Pop to discuss their business, and watch their operation for about a week. You discover quickly that a video and a DVD are both copies of a movie kept in a separate plastic case that is rented out. They have several copies of each movie they rent; therefore there are several videos and DVDs for each movie title. You learn that in their inventory they have several thousand videos and DVDs, which they get wholesale from about a half dozen distributors. The video and DVD prices to them are based on the quantity of their shipment and the past business they have done with each company. The price of a DVD for a movie might be different than the price of a video for the same movie, even from the same distributor. Each distributor provides different types of movies (e.g., suspense, horror, mystery, comedy, etc.). A single distributor may provide several different types of movies in both video and DVD format. It is possible to obtain the same movie from multiple distributors, and at different wholesale prices. Each video and DVD has a unique identification number that Mom and Pop assign in their inventory, in addition to the distributor's serial number for the item. Each movie also has a unique identification number Mom and Pop assign in addition to the title, and any movie IDs the distributors use in their electronic catalogs. Distributors provide electronic catalogs to Mom and Pop and the information from these catalogs must be included in the database. Mom and Pop need to record when a video or DVD is rented, when a video or DVD is returned, and all customer charges such as late and damaged fees, failure to rewind fees, and taxes. They need a report of which videos are returned late because there are standard and late charges. On occasion there are discount prices for certain movies or types of movies. Customers want to rent movies based on actors or actresses, running length, type of movie, rating, year released, the director, and the academy awards won (by the movie, the actors, the actresses and/or the directors). Customers also want to know how many videos they have rented in the last month, year, and so forth. Mom and Pop need to keep only basic information on customers in their database, such as name, address, telephone numbers, etc. There must be no limit to the number of video and/or DVD copies of a movie that Mom and Pop can have in their inventory. Video/DVD ID numbers, movie ID numbers, and distributor ID numbers for videos, DVDs, and movies are all different. Also, each movie must be able to have an unlimited number of actors, actresses, directors, and academy awards (i.e., Oscars). Other types of awards (e.g., Golden Globe, People's Choice, etc.) are not of interest for this application. The rental of equipment, sale of videos, DVDs, popcorn, etc., is not to be kept in the database. Using this information, you should: 1) Determine and list your entities. Then create relationship sentence pairs between those entities that are related. You should not have any many-to-many relationships

What would be the relationship sentence pairs between :

Fees, Rental Fees, Customers, Movie, Video, DVD, Distributor, Catalog, Store, Rental Details, Order, Inventory

Answer 1

Entities • Distributor • Order Inventory Rent Customer • Catalog • Video • DVD Attributes Distributor Distributor_id(primary key), anme,movie_id, movie_type_movie_format, price • Order • Order_id(primary key),,number_copies,price,distributor_id(forigen key) Inventory • Video/DVD_id_number_copies, Movie_id order_id, distributor_id(forigen key) Rent • Issude date, tax amount customer_id.video/DVD_id(forigen key),return date discount total charge Customer • Customer_id(primary key). address.phone number name Catalog • Catalog_id(primary key), movie_id(forigen key),actor.movie_type length director and released year Video · Video_id(primary key), title, Movie_id(forigen key) DVD • DVD_id(primary key).itle, Movie_id(forigen key)

ER Diagram

Movie_id Movie_type (number_copies) (Video/DVD_id order Id number copies price QQ 92999 order_id Movie_id Name (Distributor_id store Inventory order from order Distibutor Dist_Id title Distibutor_id Movie id price DVD id Listed Movie_ID Movie_format Movie_id title catalog_id video id number_copies video has Movie has DVD tax amount issue date title catalog_Id address phone has ( customer_id Movie_id 11 Rent video/DVD_id N rental fees customer checked by catalog actor customer_id name movie type return date director released year discount total charge length