Database Design

Exercise 1

The DreamHome case study 16.13 of the textbook.

Don't use plagiarized sources. Get Your Custom Essay on
Database Design
Just from $13/Page
Order Essay

Create a conceptual data model for the Branch user views of DreamHome documented in Appendix A.

Compare your ER diagram with Figure 13.8 of the textbook and justify any differences found. Analyze the DreamHome case study and examine if there are situations that call for enhanced modeling. Present the enhanced data model of the case.

Exercise 2

Answer the following questions with reference to how the ER model in Figure 17.13 maps of the book to relational tables.

(a) How many relations will represent the ER model?

(b) How many foreign keys are mapped to the relation representing X?

(c) Which relation(s) will have no foreign key?

(d) Using only the letter identifier for each entity, provide appropriate names for the relations mapped from the ER model.

(e) If the cardinality for each relationship is changed to one-to-one with total participation for all entities, how many relations would be derived from this version of the ER model?

Exercise 3

Create your own store! Your store should sell one type of things, like clothing or bikes, whatever you want your store to specialize in. You should have a table for all the items in your store, and at least 5 columns for the kind of data you think you’d need to store. You should sell at least 15 items, and use select statements to order your items by price and show at least one statistic about the items.

Exercise 4

We’ve created a database for customers and their orders. Not all of the customers have made orders, however. Come up with a query that lists the name and email of every customer followed by the item and price of orders they’ve made. Use a LEFT OUTER JOIN so that a customer is listed even if they’ve made no orders, and don’t add any ORDER BY.


Calculate The Price Of Your Paper

{{total || ""}}

Why Choose Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

Customer Support 24/7

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.


Essay Writing Services

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.


Admission and Business Papers

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.


Editing and Proofreading

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.


Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.