Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 9, Problem 9.15RQ
What is a helper table, and why is it often used to help organize derived data?
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Chapter 9 Solutions
Modern Database Management (12th Edition)
Ch. 9 - Prob. 9.1RQCh. 9 - Prob. 9.2RQCh. 9 - Prob. 9.3RQCh. 9 - List the five major trends that necessitate data...Ch. 9 - Prob. 9.5RQCh. 9 - Prob. 9.6RQCh. 9 - Prob. 9.7RQCh. 9 - Prob. 9.8RQCh. 9 - Prob. 9.9RQCh. 9 - Prob. 9.10RQ
Ch. 9 - List four objectives of derived data.Ch. 9 - Prob. 9.12RQCh. 9 - Prob. 9.13RQCh. 9 - Explain the pros and cons of logical data marts.Ch. 9 - What is a helper table, and why is it often used...Ch. 9 - Describe the characteristics of a surrogate key as...Ch. 9 - Prob. 9.17RQCh. 9 - What is the purpose of conformed dimensions for...Ch. 9 - Prob. 9.19RQCh. 9 - Prob. 9.20RQCh. 9 - Prob. 9.21RQCh. 9 - Prob. 9.22RQCh. 9 - Prob. 9.23RQCh. 9 - Prob. 9.24RQCh. 9 - Describe the current key trends in data...Ch. 9 - Prob. 9.26PAECh. 9 - Prob. 9.27PAECh. 9 - Prob. 9.28PAECh. 9 - Prob. 9.29PAECh. 9 - You are to construct a star schema for Simplified...Ch. 9 - Simplified Automobile Insurance Company would like...Ch. 9 - Prob. 9.32PAECh. 9 - Prob. 9.33PAECh. 9 - Prob. 9.34PAECh. 9 - Prob. 9.35PAECh. 9 - Prob. 9.37PAECh. 9 - Prob. 9.38PAECh. 9 - Prob. 9.39PAECh. 9 - Prob. 9.40PAECh. 9 - Prob. 9.41PAE
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- The ability to combine two or more tables through common data attributes to form a new table with only the unique data attributes is called _______________.arrow_forwardExplain the process of denormalization and when it might be necessary in database design.arrow_forwardBy creating a data model, you may justify its use in database architecture.arrow_forward
- Explain the process of de-normalization and when it is appropriate to use in database design.arrow_forwardAssignment Brief: Some of the most difficult decisions that you face as a database developer are what tables to create and what columns to place in each table, as well as how to relate the tables that you create. Normalization is the process of applying a series of rules to ensure that your database achieves optimal structure. Normal forms are a progression of these rules. Each successive normal form achieves a better database design than the previous form did. Based on your understanding for the various normal form respond to the following problems and provide the optimal answer/solution. Problem#1: 1st Normal Form (1NF) Consider the Students table, with the primary key underlined, and the following data: Students: Alpha 100111 Email doe@usna.edu Name Courses GradePoints NN204, SI204, IT221 SM223, EE301 SI204 John Doe 2,3,3 Matt Smith 092244 113221 smith@usna.edu black@usna.edu 4,4 Melinda 3 Black NN204, SI204, IT221 090112 Tom Johnson Johnson@usna.ed 4,2,3 u a) Is the Students table…arrow_forwardWhat exactly is a Parent table?arrow_forward
- How does denormalization differ from normalization, and what are the situations where denormalization might be beneficial in database design?arrow_forwardExplain the concept of normalization and its role in database design.arrow_forwardDescribe the process of denormalization in database design. When is denormalization appropriate, and what are its potential benefits and drawbacks?arrow_forward
- Topic: Database Design It is known that can use the DBMS system to create a surrogate primary key when there is a natural key. What implications does this have on the DB performancewhen searching the table for a specific column (such as ROOM). Hint: When the table is created, the DBMS setups the table to be able to search on the primary key very quickly. What if this Event table was used by a Corporate Hotel chain to keep track of every they have hosted over the past 30 years in all of their hotels across all their chains (i.e. 8000 locations, 5 events a week avg, 30 years of data ~62.4 million events)?arrow_forwardExplain the concept of normalization in database design. What are the benefits of a normalized database?arrow_forwardIiioparrow_forward
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