Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Question
Chapter 2, Problem 2.50PAE
Program Plan Intro
(a)
Draw an ERD for online marketplace which sells wallpaper, draperies and home decorating accessories based on provided information.
Program Plan Intro
(b)
User above ERD to name entities, attributes and relationships which will be needed to provide answer to following queries.
- Find other customers who had bought the same product a given customer or prospective customer had bought or was considering buying.
- Find other products other customers bought who also bought the product the customer just bought.
- Find other customers with at least three interests that overlaps with those of a given customer so that he can suggest to these customers other products they might want to purchase.
Program Plan Intro
(c)
Make changes in the ERD drawn above with respect to the given information.
Program Plan Intro
(d)
Make changes in the ERD drawn above with respect to the given information.
Program Plan Intro
(e)
User above ERD to name entities, attributes and relationships which will be needed to provide answer to following queries.
- Find products bought by customers in a same geographical area.
- Search products based on categories and characteristics of product.
- Find the products as per ratings, popularity and price.
In case the above ERD is not able to handle above queries make modifications in it to handle these queries.
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PVF manufactures high-quality wood furniture and distributes it to retail stores throughout the United States. Its product lines include dinette sets, stereo cabinets, wall units, living room furniture, and bedroom furniture. In the early 1990s, PVF’s founder, Alex Schuster, started to make and sell custom furniture in his garage. Alex managed invoices and kept track of customers by using file folders and a filing cabinet. By 1994, business expanded and Alex had to rent a warehouse and hire a part-time bookkeeper. PVF’s product line had multiplied, sales volume had doubled, and staff had increased to 50 employees. By 2000, PVF moved into its third and present location. Due to the added complexity of the company’s operations, Alex reorganized the company into the following functional areas:
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Sales
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Purchasing
PINE VALLEY FURNITURE
Alex and…
Draw an ER diagram that represents the main aspects of the Apple products database (entities, attributes, relationships, mapping cardinalities, etc.)
Entity Sets:
Customer
Preference
Apple product
Store
Factory
Product_Item
Relationships:
Buys
Sells
Contracts
Produces
Has
Contains
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Store sells apple product
Factory contracts_with Store
Factory produces apple product
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It's likely that this is what's being discussed on your data warehousing project team right now: whether or not to create a data warehouse prototype initially. In order to be ready for the enterprise-wide data warehouse, you'll need to learn some data warehousing basics. In other words, what do you want to say? So, what are your thoughts?
Chapter 2 Solutions
Modern Database Management
Ch. 2 - Define each of the following terms: entity type...Ch. 2 - Match the following terms and definitions....Ch. 2 - Contrast the following terms: stored attribute;...Ch. 2 - Prob. 2.4RQCh. 2 - Prob. 2.5RQCh. 2 - Prob. 2.6RQCh. 2 - State six general guidelines for naming data...Ch. 2 - Prob. 2.8RQCh. 2 - Prob. 2.9RQCh. 2 - State three conditions that suggest the designer...
Ch. 2 - List the four types of cardinality constraints,...Ch. 2 - Give an example, Other than those described in...Ch. 2 - What is the degree of a relationship? List the...Ch. 2 - Give an example (Other than those described in...Ch. 2 - Give an example of each of the following, other...Ch. 2 - Give an example of the use of effective (or...Ch. 2 - State a rule that says when to extract an...Ch. 2 - Prob. 2.18RQCh. 2 - In addition to explaining what action is being...Ch. 2 - For the Manages relationship in Figure 2-12a,...Ch. 2 - Explain the distinction between entity type and...Ch. 2 - Why is it recommended that every ternary...Ch. 2 - A cellular operator needs a database to keep track...Ch. 2 - Prob. 2.24PAECh. 2 - Answer the following questions concerning Figure...Ch. 2 - Prob. 2.26PAECh. 2 - You may have been assigned a CASE or a drawing...Ch. 2 - Consider the two E-R diagrams in Figure 2-25 Q,...Ch. 2 - Prob. 2.29PAECh. 2 - Are associative entities also weak entities? Why...Ch. 2 - Because Visio does not explicitly show associative...Ch. 2 - Figure 2-26 shows a grade report that is mailed to...Ch. 2 - Prob. 2.33PAECh. 2 - The Is Married To relationship in Figure 2-12a...Ch. 2 - Figure 2-27 represents a situation of students who...Ch. 2 - Figure 2-28 shows two diagrams (A and B), both of...Ch. 2 - Prob. 2.37PAECh. 2 - Review Figure 2-8LQ and Figure 2-22. Identify any...Ch. 2 - Prob. 2.39PAECh. 2 - Prob. 2.40PAECh. 2 - Prob. 2.41PAECh. 2 - Prob. 2.42PAECh. 2 - Prob. 2.43PAECh. 2 - Prob. 2.44PAECh. 2 - Prob. 2.45PAECh. 2 - Prob. 2.46PAECh. 2 - Prob. 2.47PAECh. 2 - Prob. 2.48PAECh. 2 - Draw an ERD for the following situation. (State...Ch. 2 - Prob. 2.50PAECh. 2 - Prob. 2.51PAECh. 2 - Review your answer to Problem and Exercise 2-49 if...
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