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Modern Database Management
13th Edition
ISBN: 9780134773650
Author: Hoffer
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 4.9RQ
Fill in the blanks in each of the following statements:
- A relation that has no partial functional dependencies is innormal form.
- A relation that has no transitive dependencies is innormal form.
- A relation that has no multivalued attributes is in normal form.
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Exercise 4:
R1 = {(a, b) E R² | a > b}, the “greater than" relation,
R2 = {(a, b) E R² | a > b}, the “greater than or equal to" relation,
R3 = {(a, b) E R² | a < b}, the "less than" relation,
R4 = {(a, b) E R² | a
Random Hospital Example ERD Problem
Follow the Simple Procedure for ERD diagramming to design an ERD using the following user provided information. Remember the ERD will eventually turn into the design for a database from a top down view. Make sure you resolve any many to many conflicts. Label an identifier or primary key and all pertinent attributes given. If an attribute is not readily apparent from the user information, then make one up that makes sense for the particular entity. Therefore, all entities should end up with at least an identifier and another attribute that makes sense.
You may use any of the approaches shown by the book, though the ER-Model and Crow’s foot are the most common. Make sure you show entities, relationships, cardinality, and optionality.
Random Hospital Example
A hospital has 10 wards, each containing up to 20 patients. Patients have only one doctor allowed to prescribe drugs for them. Doctors do their rounds once a day and prescribe drugs by…
Chapter 4 Solutions
Modern Database Management
Ch. 4 - Define each of the following terms: determinant...Ch. 4 - Prob. 4.2RQCh. 4 - Prob. 4.3RQCh. 4 - Describe the primary differences between the...Ch. 4 - Summarize six important properties of relations.Ch. 4 - Describe two properties that each candidate key...Ch. 4 - Describe the three types of anomalies that can...Ch. 4 - Demonstrate each of the anomaly types with an...Ch. 4 - Fill in the blanks in each of the following...Ch. 4 - What is a well-structured relation? Why are...
Ch. 4 - Prob. 4.11RQCh. 4 - Describe how the following components of an E-R...Ch. 4 - Prob. 4.13RQCh. 4 - Prob. 4.14RQCh. 4 - Briefly describe four typical problems that often...Ch. 4 - Prob. 4.16RQCh. 4 - Explain how each of the following types of...Ch. 4 - Prob. 4.18RQCh. 4 - Prob. 4.19RQCh. 4 - Prob. 4.20RQCh. 4 - Prob. 4.21RQCh. 4 - What is the relationship between the primary key...Ch. 4 - Prob. 4.23RQCh. 4 - Explain what can be done with primary keys to...Ch. 4 - Prob. 4.25RQCh. 4 - Explain three conditions that suggest a surrogate...Ch. 4 - Prob. 4.27RQCh. 4 - For each of the following E-R diagrams from...Ch. 4 - Prob. 4.29PAECh. 4 - Prob. 4.30PAECh. 4 - For your answers to the following Problems and...Ch. 4 - Figure 4-3212 shows a class list for Millennium...Ch. 4 - Prob. 4.33PAECh. 4 - Prob. 4.34PAECh. 4 - Prob. 4.35PAECh. 4 - Prob. 4.36PAECh. 4 - Prob. 4.37PAECh. 4 - Prob. 4.38PAECh. 4 - Prob. 4.39PAECh. 4 - Transform Figure 2-15a, attribute version, to 3NF...Ch. 4 - The Public Safety office at Millennium College...Ch. 4 - Prob. 4.42PAECh. 4 - Prob. 4.43PAECh. 4 - Prob. 4.44PAECh. 4 - For your answers to Problem and Exercise 3-33 from...Ch. 4 - Prob. 4.46PAECh. 4 - Prob. 4.47PAECh. 4 - Figure 4-38 includes an EER diagram for a...Ch. 4 - Prob. 4.49PAECh. 4 - Prob. 4.50PAECh. 4 - Prob. 4.51PAECh. 4 - Prob. 4.52PAECh. 4 - Figure 4-40 shows an EER diagram for a university...Ch. 4 - Explore the data included in Table 4-9. Assume...Ch. 4 - Prob. 4.55PAECh. 4 - Prob. 4.56PAECh. 4 - Prob. 4.57PAECh. 4 - Prob. 4.58PAE
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- HouseSale (houseID, agentID, dateSold, commissionRate, interestRate) Where: dateSold interestRate agentID → commission Rate houseID →dateSold What is the highest normal form that the above relation satisfies? Decomposition into BCNF:arrow_forward. Students(stulD, lastName, firstName, major, credits) Faculty (facID, name, deptName, rank) • Classes(classNumber, facID, schedule, room) • Enrolls(stulD, classNumber, grade) The primary keys are underlined. The referential integrity constraints are as follows: . the column facID of relation Classes that references table Faculty, . the column stulD of relation Enrolls that references table Students, and the column classNumber of relation Enrolls that references table Classes. The following query is intended to retrieve the number of all classes taught by John Smith in the CST department. However, this query does not work properly. There are at least two faculty members who share the name, John Smith. Briefly explain and show the corrected SQL query_ why. SELECT classNumber FROM Classes WHERE facID= (SELECT facID FROM Faculty WHERE name='John Smith' AND deptName='CST');arrow_forwardDatabases: Regular entity type is transformed to a relation.arrow_forward
- B. Art Museum Database Draw an EER diagram to keep track of information for an art museum. Assume that the following requirements were collected: (10 marks) The museum has a collection of art objects. Each art object has a unique ID, a year (when it was created, if known), a title, and a description. Art objects must be categorized based on their type. There are three main types: painting, sculpture, plus another type called other to accommodate objects that do not fall into one of the two main types. A painting has a paint type (oil, watercolor, etc.), material on which it is drawn on (paper, canvas, wood, etc.), and style (modern, abstract, etc.). A sculpture has a material from which it was created (wood, stone, etc.), height, weight, and style. An art object in the other category has a type (print, photo, etc.) And style. The museum keeps track of artist information, if known: name, date born (if known), date died (if not living), country of origin, epoch, main style, and…arrow_forwardWe have a relation with the following attributes: R={A,B,C,D,E} and all the attributes are atomic. Primary key of this relation is AB. What is the normal form of this relation given the following functional dependencies: AC→D, AB→C, AB→D, AB→E Select one: a. First Normal Form b. This relation is not normal. c. Third Normal Form d. Second Normal Formarrow_forwardlet R be a relation defined on the set z by aRb if a < b. What property/properties are violated? A. Symmetric & transitive B. Reflexive & Symmetric C. Reflexive & Transitive D. All three propertiesarrow_forward
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