MODERN DATABASE MGMT.(PEARSON CHANNEL)
13th Edition
ISBN: 9780136709299
Author: Hoffer
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 2.11RQ
List the four types of cardinality constraints, and draw an example of each.
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The contrasting characteristics of overlapping and disjoint constraints are the focus of this description.
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Chapter 2 Solutions
MODERN DATABASE MGMT.(PEARSON CHANNEL)
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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- Normalize the following schema, with given constraints, to 4NF. books(accessionno, isbn, title, author, publisher) users(userid, name, deptid, deptname) accessionno → isbn isbn → title isbn → publisher isbn →→ author userid → name userid → deptid deptid → deptnamearrow_forwardQuestion 2 A resource constraint refers to any functional constraint with a 2 sign in a linear programming model. O True O Falsearrow_forwardProvide some concrete examples of how the following criteria might be restated in quantitative terms. It is up to you to decide what measurements are appropriate to represent the requirements.First, the library catalog has to be intuitive.Second, all patrons should get the same level of service from the library system.3 User requests for book information from the library system must be fulfilled promptly.arrow_forward
- Given a relation with underlined key attributes as below A B 1 7 2 7 10 3 8 11 4 8 11 7 10 • Specify all function dependencies across all the attributes (use arrow (A=>B), including between two attributes and between combinations of more than two attributes to show the functional dependencies). • Carefully analyze the detected functional dependencies and specify the normal form of this relation. • Use normalization to convert the relation into one step higher normal form, e.g., if it's in 2NF then convert it into 3NF, if it's in 3NF then convert it into BCNF. Clearly specify new relations with data, prime and non-prime attributes.arrow_forwardPE Table 5-1 should be examined carefully. Can any needs or restrictions that you can conceive of that were neglected be identified? Make a list of them.arrow_forwardDescribe how you would deal with the relation type M:N using a practical example.arrow_forward
- You may assume the followings: • Each material item has one or more vendor. Each vendor may supply one or more. items or may not supply any items. • The unit price for a material item may vary from one vendor to another. • The terms for a supplier are the same for all material items ordered from that supplier. Please answer the following questions: 1. Draw a dependency diagram to show the functional dependencies in the relation. 2. Decompose the relation into a set of 3NF relationsarrow_forwardYou may assume the followings: • Each material item has one or more vendor. Each vendor may supply one or more. items or may not supply any items. • The unit price for a material item may vary from one vendor to another. • The terms for a supplier are the same for all material items ordered from that supplier. Please answer the following questions: 1. Draw a dependency diagram to show the functional dependencies in the relation. 2. Decompose the relation into a set of 1NF, 2NF & 3NF relations with each normal form dependency diagramarrow_forwardTurn the following ER Diagram into a collection of relation schemas. Identify as many of the constraints as possible. Note: Courses is a weak entity set, and Number is a discriminator because it can be used to differentiate different courses once the department Code is given. Courses Depts Number: int. Title: varchar(30) Credit: int Code: char(4) Name: varchar(20) Budget: int GivenBy TaughtBy Instructors WorksIn ID: int FName: varchar(20) LName: varchar(20)arrow_forward
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