Database Concepts (7th Edition)
7th Edition
ISBN: 9780133544626
Author: David M. Kroenke, David J. Auer
Publisher: PEARSON
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Chapter 5, Problem 5.27RQ
Explanation of Solution
One-to-many relationship (1:N):
One-to-many relationship is one of the types of binary relationship that refer to the relationship between two entities which means one parent field or record can be associated with one or more child field or record.
ID-dependent entity:
In the entity-relationship model, an identifier of one entity is dependent on the identifier of another entity and it is special kind of weak entity.
- In entity-relationship model, id-dependent entity is represented as rounded corners.
- Note: Identifier is an attribute which is used to uniquely identify a particular entity instances from an entity.
Example:
In a class
IE Crow’s feet ER diagram:
Information Engineering is a method to represent the relationship between entities...
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Any weak entity set can be turned into a strong entity set by just adding the right properties. So, why are our entity sets so bad?
What's the difference between weak and strong entity sets?
Explain the difference between a weak and a strong entity set.
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
- Using a non-book example, define the words functional dependence and determinant.arrow_forwardCan you define the weak entity type for me? Is there a secret to it? Provide an instance Just what does it mean to specialize in attribute?Where does ia fit into an ER diagram? Provide Illustration or Diagramarrow_forwardConsider the relation schema R (A, B, C, D) with all possible functional dependencies. For each of the following situations, identify the highest normal form for this relation R. A, C -> B, D C -> D A, C -> B, D B -> D A, C -> B, Darrow_forward
- Consider two entity sets A and B that both have the attribute X (among otherswhose names are not relevant to this question). If the two Xs are completely unrelated, how should the design be improved?arrow_forwardWhat does the weak entity type actually mean? What's the secret? Give an instance What does alternative specialization mean?How am I shown on the ER diagram? Give an example and create a diagram to match it.arrow_forwardExplain weak and strong entity sets.arrow_forward
- EER MODEL IN THIS ONE EXPERT ALREADY ANSWERD TILL 3-25 c SO I NEED ANS FROM D 3-25For a library, the entity type HOLDING has four sub-types: BOOK, AUDIO BOOK, DVD, and SOFTWARE. Draw a separate EER diagram segment for each of the following situations:a. At a given time, a holding must be exactly one of these subtypes.b. A holding may or may not be one of these subtypes. However, a holding that is one of these subtypes cannot at the same time be one of the other subtypes.c. A holding may or may not be one of these subtypes. On the other hand, a holding may be any two (or even four) of these subtypes at the same time.d. At a given time, a holding must be at least one of these subtypes. 3-26A bank has three types of accounts: checking, savings, and loan. Following are the attributes for each type of account:CHECKING: Acct No, Date Opened, Balance, Service ChargeSAVINGS: Acct No, Date Opened, Balance, Interest RateLOAN: Acct No, Date Opened, Balance, Interest Rate, PaymentAssume that each…arrow_forwardOO questions Create the UML diagram for the two entities( person, books). A person has borrowed some books from a library. This can be represented as one to many associations. Please implant this bidirectional association considering that there is no order of the books.arrow_forwardGive Some additional examples of strong and weak entity pairs?arrow_forward
- Strongen a weak entity set by adding primary key attributes. Please explain our choice's overlap.arrow_forwardFor a library, the entity type HOLDING has four subtypes: BOOK, AUDIO BOOK, DVD, and SOFTWARE. Draw a separate EER diagram segment for each of the following situations:a. At a given time, a holding must be exactly one of these subtypes.b. A holding may or may not be one of these subtypes. However, a holding that is one of these subtypes cannot at the same time be one of the other subtypes.c. A holding may or may not be one of these subtypes. On the other hand, a holding may be any two (or even four) of these subtypes at the same time.d. At a given time, a holding must be at least one of these subtypes.arrow_forwardTalk about what weak and strong entity sets are.arrow_forward
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Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY