Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 5, Problem 5.42PAE
Consider the relations specified in Problem and Exercise 8-53 i9. Assume that the
LEAGUE (LeagueID, LeagueName, LeagueLocation)
In addition, TEAM has an attribute TeamLeague. The following database operations are typical:
- Adding new players.
- Adding new player contracts.
- Updating player specialty codes.
- Updating city populations.
- Reporting players by team.
- Reporting players by team and specialty.
- Reporting players ordered by salary.
- Reporting teams and their players by city.
- Identify the foreign keys.
- Specify the types of indexes you would recommend for this situation. Explain how you used the list of operations described above to arrive at your recommendation.
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The model above needs some improvement. Where you can apply all the normalization rules to attributes. Furthermore, you also need to explain entities and relations between them, and the purpose of attributes by showing why and how they exist ?.
Let the database has two relations P(a, b) and
Q(m, a, n) in which a is the primary key of the
relation P and m is the primary key of the
relation Q. Instance of P has 70 Tuples and
Instance of Q has 42. What is the maximum
number of rows in the new instance produced by
P Q? ( is natural join)
Let us consider the following relational database.
Students(stuID, lastName, firstName, major, gpa)
Faculty(facID, name, deptName, rank)
Classes(classNumber, facID, schedule, room)
Enrolls(stuID, classNumber, grade)
The column facID of relation Classes that references the table Faculty,
The column StuID of relation Enrolls that references table Students, and
The column classNunber of relation Enrolls that references table Classes.
The following SQL statement is intended to add a record to the table Students. Assume that the entered value for each column is appropriate. In other words, there is no domain constraint violation.
INSERT INTO Students(stuID, lastName, firstName, major) VALUES('950555111', 'Anna' 'Smith', 'BSIT');
However, this statement does not work correctly. Briefly explain why and list the correct SQL statement.
Chapter 5 Solutions
Modern Database Management (12th Edition)
Ch. 5 - Prob. 5.1RQCh. 5 - Prob. 5.2RQCh. 5 - Prob. 5.3RQCh. 5 - Prob. 5.4RQCh. 5 - Prob. 5.5RQCh. 5 - Prob. 5.6RQCh. 5 - Prob. 5.7RQCh. 5 - Prob. 5.8RQCh. 5 - Explain why you sometimes have to reserve much...Ch. 5 - Why are field values sometimes coded?
Ch. 5 - Prob. 5.11RQCh. 5 - Prob. 5.12RQCh. 5 - Explain why normalized relations may not comprise...Ch. 5 - Prob. 5.14RQCh. 5 - List three common situations that suggest that...Ch. 5 - Explain the reasons why some experts are against...Ch. 5 - Prob. 5.17RQCh. 5 - Prob. 5.18RQCh. 5 - Prob. 5.19RQCh. 5 - Prob. 5.20RQCh. 5 - Prob. 5.21RQCh. 5 - State nine rules of thumb for choosing indexes.Ch. 5 - One of the strongest recommendations regarding...Ch. 5 - Explain why an index is useful only if there is...Ch. 5 - Indexing can clearly be very beneficial. Why...Ch. 5 - Consider the following two relations for...Ch. 5 - Prob. 5.28PAECh. 5 - Prob. 5.29PAECh. 5 - Prob. 5.30PAECh. 5 - Prob. 5.31PAECh. 5 - Suppose you are designing a default value for the...Ch. 5 - When a student has not chosen a major at a...Ch. 5 - Prob. 5.34PAECh. 5 - Prob. 5.35PAECh. 5 - Consider the relations in Problem and Exercise...Ch. 5 - Prob. 5.37PAECh. 5 - Prob. 5.38PAECh. 5 - Prob. 5.39PAECh. 5 - Prob. 5.40PAECh. 5 - Prob. 5.41PAECh. 5 - Consider the relations specified in Problem and...Ch. 5 - Prob. 5.43PAECh. 5 - Prob. 5.44PAECh. 5 - Prob. 5.45PAECh. 5 - Prob. 5.46PAECh. 5 - Prob. 5.47PAECh. 5 - Problems and Exercises 8-65 through 8-68 refer to...Ch. 5 - Refer to the large Pine Valley Furniture Company...Ch. 5 - Problems and Exercises 8-65i5 through 8-68 refer...Ch. 5 - Refer to Figure 4-5 0. For each of the following...
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