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 5.38PAE
Program Plan Intro
Problems that might arise from vertical partitioning of a relation and general conditions influencing them.
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Given these potential problems, what general conditions influence when to partition a relation vertically?
What problems can arise from vertical partitioning of a relation and general conditions influencing them.
What general criteria, in light of these possible difficulties, determine whether it is appropriate to divide a relation vertically?
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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- How does the primary key of a relation relate to the interdependencies among its other attributes from a practical standpoint?arrow_forwardHow does the primary key of a relation relate to the interdependencies of its characteristics from a functional standpoint?arrow_forwardAn explanation of the three circumstances in which the secondary key of a relation should be used instead of the main key of the connectionarrow_forward
- Explain three scenarios in which a surrogate key for a relation's primary key should be generated.arrow_forwardWhat are the conditions under which an attribute of a relation may have a changeable length?arrow_forwardMCQS In RDBMS, each attribute is represented only even for foreign keys true false To convert a DBMS into 1 NF, we remove all the functional dependencies from the relation true false A relation can have maximum number of attributes necessary to support the data requirements of the enterprise true false Joins in RDBMS relations are always loss-less true false To cater for various types of anomalies, we can break the relation into two with a foreign key to reference the parent relation True False RDBMS are optimized for storage True Falsearrow_forward
- Describe three circumstances in which a substitute key for a relation's primary key should be established.arrow_forwardWhat are three advantages of using a surrogate key rather than the main key to access a relation instead?arrow_forwardexplanation of three situations in which a relation's secondary key should be set in place of the primary keyarrow_forward
- Here are three examples of when it makes sense to create a surrogate key in place of the primary key in a relation.arrow_forwardBased on the following functional dependencies, for the relation SCHEDULE bring it into a set of 3NF relations. Dependencies: Section#, CourseID, Semester ID → RoomNo Section#, CourseID, Semester ID → Inst_ID Section#, CourseID, Semester ID → Week_day Section#, CourseID, Semester ID → Start_time Section#, CourseID, Semester ID → End_time Course_ID → Course Name RoomNo → Occupancy Instr_ID → Instr_name SCHEDULE CourseID, Section#, Semester ID, Course Name ,RoomNo, Occupancy, Inst_ID, Instr_Name, Week_day, Start_time, End_time)arrow_forwardWhat does it mean to be related? How do you define a relation's properties?arrow_forward
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