Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
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Chapter 5, Problem 5.10RQ
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Foreign key:
In DBMS (
- A foreign key act as a cross-reference between two tables because a foreign key references a primary key of other table, so a foreign key build a connection between the two table.
- When compare to primary key, an implementation of foreign key is more complex...
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Check out a sample textbook solutionStudents have asked these similar questions
Describe a primary key, candidate key, secondary key, foreign key, and a combination key. Provide an example for each.
What are the potential repercussions of having a low level of "isolation" in transactions?
What is the Meaning of ENHANCED_KEY?
Chapter 5 Solutions
Database Concepts (7th 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
- Can Primary key contain two entities? Explain why?arrow_forwardIf a foreign key is used to protect the database, why is that necessary? Is there any kind of justification for the significance of this?arrow_forwardDiscuss the role of primary keys and foreign keys in maintaining data integrity during normalization.arrow_forward
- How does the foreign key affect database integrity? Why?arrow_forwardWhat would happen if there was a breach in the database's referential integrity? Just how frequently do you err, and what are they?arrow_forwardPlease discuss three modern methods for database security in over sixty words and with well labelled images.arrow_forward
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