Modern Database Management (12th Edition)
12th Edition
ISBN: 9780133544619
Author: Jeffrey A. Hoffer, Ramesh Venkataraman, Heikki Topi
Publisher: PEARSON
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Chapter 3, Problem 3.25PAE
For 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:
- At a given time, a holding must be exactly one of these subtypes.
- 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.
- 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.
- At a given time, a holding must be at least one of these subtypes.
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ENHANCED CHEN METHODOLOGYEER MODEL3-25For 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 bank account must be a member of exactly one…
The distinction between a weak and a strong entity collection has to be clarified.
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…
Chapter 3 Solutions
Modern Database Management (12th Edition)
Ch. 3 - Define each of the following terms: supertype...Ch. 3 - Prob. 3.2RQCh. 3 - Contrast the following terms: supertype; subtype...Ch. 3 - State two conditions that indicate when a database...Ch. 3 - Prob. 3.5RQCh. 3 - Give an example (other than those discussed in the...Ch. 3 - What is the attribute inheritance? Why is it...Ch. 3 - Give an example of each of the following: a...Ch. 3 - What types of business rules are normally captured...Ch. 3 - What is the purpose of a subtype discriminator?
Ch. 3 - Prob. 3.11RQCh. 3 - In what ways is starting a data modeling project...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - What do you purchase when you acquire a packaged...Ch. 3 - Prob. 3.16RQCh. 3 - When is a member of a supertype always a member of...Ch. 3 - Examine the hierarchy for the university EER...Ch. 3 - Add a subtype discriminator for each of the...Ch. 3 - For simplicity, subtype discriminators were left...Ch. 3 - Refer to the employee EER diagram in Figure 3-2....Ch. 3 - Refer to the EER diagram for patients in Figure...Ch. 3 - Figure 3-13 shows the development Of entity...Ch. 3 - Refer to Problem and Exercise 2-44 in Chapter 2...Ch. 3 - For a library, the entity type HOLDING has four...Ch. 3 - A bank has three types of accounts: checking,...Ch. 3 - Refer to your answer to Problem and Exercise 2-4...Ch. 3 - Refer to your answer to Problem and Exercise 3-24...Ch. 3 - Prob. 3.29PAECh. 3 - Prob. 3.30PAECh. 3 - Develop an EER model for the following situation,...Ch. 3 - Draw an EER diagram for the following description...Ch. 3 - Prob. 3.33PAECh. 3 - Prob. 3.34PAECh. 3 - Based on the EER diagram constructed for Problem...Ch. 3 - Prob. 3.36PAECh. 3 - Prob. 3.37PAECh. 3 - Add the following to Figure 3-16: An EMPLOYMENT...
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- The following ERD refers to an borrow system of a library. Member can borrow different books, which were written by different authors and published by different publishers. A writer can be contracted to one or more publishers. Each member can have different borrows with different books to different expiring dates.a)Give two Attributes for each entity. Draw them directly into the ER-diagram. b)Give a primary key for each entity. Draw it directly into the ER-diagram. c)Create the SQL statement for implementing the table for one of the entities of the up standing ERDarrow_forwardThe disjoint rule specifies that if an entity instance of the supertype is a member of one subtype, it MUST simultaneously be a member of another subtype. Select one: O a. FALSE O b. TRUEarrow_forwardProper Explanationarrow_forward
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- Question 1:The following ERD refers to an borrow system of a library. Member can borrow different books, which were written by different authors and published by different publishers. A writer can be contracted to one or more publishers. Each member can have different borrows with different books to different expiring dates.a) Give two Attributes for each entity. Draw them directly into the ER-diagram. b) Give a primary key for each entity. Draw it directly into the ER-diagram. c) Create the SQL statement for implementing the table for one of the entities of the up standing ERD.arrow_forwardWhat's the difference between weak and strong entity sets?arrow_forwardGive an example of how the distinction between a candidate key and an entity type identifier is made.arrow_forward
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