Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 5.23RQ
For your answers to questions 5.20, 5.21, and 5.22, describe a method for obtaining the children for one of the entities in the original data model, given the primary key of the table based on the second entity, Also, describe a method for obtaining the children for the second entity, given the primary key of the table based on the first entity.
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The many-to-many relationship between entities is not supported by which data model? Please explain the model's advantages and disadvantages.
Which data model does not support the many-to-many relationship between
entities? Explain that model with advantages and disadvantages?
Part 2: Relational data model. Take a subset of the ideas from the conceptual model you constructed in Part 1 and design a simple relationship model similar to the ones we discussed in Module 2, Video 4
Your model should have at least 5 tables
You should include at least 20 attributes, or fields, in your model (20 total across all tables, not per table)
Your model should be normalized
Identify the primary key in each table, and state whether it is a natural or surrogate key
For each relationship between tables, identify any foreign keys needed to define the relationship
For each table, identify what type of system or systems you think the data might come from, like those we discussed in Module 1, Video 6.
Chapter 5 Solutions
Database Concepts (8th Edition)
Ch. 5 - Explain how entities are transformed into tables.Ch. 5 - Prob. 5.2RQCh. 5 - Prob. 5.3RQCh. 5 - What is denormalization?Ch. 5 - Prob. 5.5RQCh. 5 - Explain the problems that denormalized tables may...Ch. 5 - Explain how the representation of weak entities...Ch. 5 - Explain how supertype and subtype entities are...Ch. 5 - Prob. 5.9RQCh. 5 - Prob. 5.10RQ
Ch. 5 - Show two different ways to represent the 1:1...Ch. 5 - Prob. 5.12RQCh. 5 - Prob. 5.13RQCh. 5 - Prob. 5.14RQCh. 5 - Prob. 5.15RQCh. 5 - Prob. 5.16RQCh. 5 - For your answer to question 5.15, code an SQL...Ch. 5 - Prob. 5.18RQCh. 5 - Prob. 5.20RQCh. 5 - Prob. 5.21RQCh. 5 - Explain how the terms parent table and child table...Ch. 5 - For your answers to questions 5.20, 5.21, and...Ch. 5 - Prob. 5.24RQCh. 5 - Prob. 5.25RQCh. 5 - Prob. 5.26RQCh. 5 - Prob. 5.27RQCh. 5 - Prob. 5.28RQCh. 5 - Define the three types of recursive binary...Ch. 5 - Prob. 5.30RQCh. 5 - Prob. 5.31RQCh. 5 - Prob. 5.32RQCh. 5 - Prob. 5.33RQCh. 5 - Prob. 5.34RQCh. 5 - Code an SQL statement that creates a table with...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- What is the role of cardinality and optionality in defining relationships between entities in a data model?arrow_forwardDefine the terms "entity," "attribute," and "relationship" in the context of entity-relationship diagrams (ERDs). How are they used in data modeling?arrow_forwardDefine the terms "entity," "attribute," and "relationship" in the context of data modeling. Provide examples to illustrate each concept.arrow_forward
- According to the data model, is it required that table every entity instance in the PRODUCT table be associated with an entity instance in the CD table? Why, or why not?arrow_forwardExplain the Entity-Relationship Diagram (ERD) as a tool for representing data models. How do entities, attributes, and relationships relate in an ERD?arrow_forwardHow are "weak entities" differentiated from "strong entities" in data modeling?arrow_forward
- Question 1 Convert the Entity Relationship diagram to a Relational Data Model.arrow_forwardDefine the terms "entity," "attribute," and "relationship" in the context of data modeling. How are these concepts used in entity-relationship diagrams (ERDs)?arrow_forward(a) Explain carefully four ways in which the diagram fails to model the intended world. In each case make sure you contrast the actual meaning with the intended meaning. (b) Give an entity-relationship diagram, still using two entity types, which correctly models the intended world. (c) Give a database schema (including primary keys) for the ER diagram which you have given in the previous part. (d) Is there any part of the ER diagram which is not captured in the schema? How might this aspect be captured in the final database?arrow_forward
- This test concerns database design, including both the logical design via the Entity Relationship (E - R) model and the physical model via relational database tables. The subject of the model is the registration of students in college classes, and there may be multiple classes for each course. The college model should include: courses (for example the CBU catalog), the current classes (or course-sections) given for courses (for example the CBU schedule for a term), the faculty qualified to teach courses, the scheduling of classes (to buildings/rooms, times, and faculty members), the assignment of faculty to students for advising (1 advisor per student), and the scheduling of students to classes.For unique identifiers you can use the following abbreviations:SID Student IDCID Course ID (ie MIS 471, …)SEC Course Section (ie A, B, C, …)BID Building ID (ie BU, BH, K, …)RID Room NumberFID Faculty IDTID Timeslot ID (ie TR 9:30, MWF 8am, …)CRN Course Record Number (an auto key for each…arrow_forwardHow do entities and attributes relate to data modeling in the context of entity-relationship diagrams (ERDs)?arrow_forward
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