The business rules for the MegaCo Corporation’s divisions are as follows: Each department has many employees but each employee works for only one department. Each department is managed by one employee and each employee can manage only one department at a time. Crow’s Foot ERD:

Question

Should the cardinality between entities be translated/read from both ends of the notation when dealing with database entity relationship modelling? In other words, should a relationship between things be understandable when read both forwards and backwards?

Answer 1

Expert Solution & Answer

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Expert Solution & Answer

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Should the cardinality between entities be translated/read from both ends of the notation when dealing with database entity relationship modelling? In other words, should a relationship between things be understandable when read both forwards and backwards?

1b)By using a scenario, explain program-data dependence issue found in previous database technologies such as file-oriented database before relational database model was introduced.

Develop an EER model for the following situation using the traditional EER notation, the Visio notation, or the subtypes inside supertypes notation, as specified by your instructor: An international school of technology has hired you to create a database management system to assist in scheduling classes. After several interviews with the president, you have come up with the following list of entities, attributes, and initial business rules: • Room is identified by Building ID and Room No and also has a Capacity. A room can be either a lab or a classroom. If it is a classroom, it has an additional attribute called Board Type. • Media is identified by MType ID and has attributes of Media Type and Type Description. Note: Here we are tracking type of media (such as a VCR, projector, etc.), not the individual piece of equipment. Tracking of equipment is outside the scope of this project. • Computer is identified by CType ID and has attributes Computer Type, Type Description,…

Answer 2

Expert Solution & Answer

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Expert Solution & Answer

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Check out sample textbook solution

Answer 3

Expert Solution & Answer

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Expert Solution & Answer

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Answer 4

Expert Solution & Answer

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Expert Solution & Answer

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Answer 5

Expert Solution & Answer

Answer 6

Expert Solution & Answer

Answer 7

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Answer 8

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

Answer 9

Chapter 2, Problem 16P

(a)

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

Answer 10

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

Answer 11

(b)

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

Answer 12

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

Answer 13

(c)

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

Answer 14

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

Answer 15

(d)

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

Answer 16

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Answer 17

(e)

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Answer 18

Expert Solution & Answer

Answer 19

Expert Solution & Answer

Answer 20

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Answer 21

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Answer 22

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Answer 23

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Answer 24

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Answer 28

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Answer 29

Ch. 2 - Prob. 1RQ Ch. 2 - What is a business rule, and what is its purpose...Ch. 2 - How do you translate business rules into data...Ch. 2 - Prob. 4RQ Ch. 2 - Explain how the entity relationship (ER) model...Ch. 2 - Prob. 6RQ Ch. 2 - Prob. 7RQ Ch. 2 - Prob. 8RQ Ch. 2 - Prob. 9RQ Ch. 2 - Prob. 10RQ

The business rules for the MegaCo Corporation’s divisions are as follows: Each department has many employees but each employee works for only one department. Each department is managed by one employee and each employee can manage only one department at a time. Crow’s Foot ERD:

Concept explainers

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

Explanation of Solution

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD:

Chapter 2 Solutions

The business rules for the MegaCo Corporation’s divisions are as follows: Each department has many employees but each employee works for only one department. Each department is managed by one employee and each employee can manage only one department at a time. Crow’s Foot ERD:

Concept explainers

Explanation of Solution

The business rules for the MegaCo Corporation’s divisions are as follows: Each department has many employees but each employee works for only one department. Each department is managed by one employee and each employee can manage only one department at a time. Crow’s Foot ERD:

Explanation of Solution

The business rules can be written as follows. A customer can download many e-books from Books Online and each of the books can be downloaded by many customers. Crow’s Foot ERD:

Explanation of Solution

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner. Crow’s Foot ERD:

Explanation of Solution

The business rule for “KwikTite” Corporation is as follows. Each factory is located in a region and each region can be a home for many factories. Each factory employs many employees but each employee is employed by only one factory. Crow’s Foot ERD:

Explanation of Solution

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees. Crow’s Foot ERD:

Chapter 2 Solutions

The business rules for the MegaCo Corporation’s divisions are as follows:

Each department has many employees but each employee works for only one department.

Each department is managed by one employee and each employee can manage only one department at a time.

Crow’s Foot ERD:

The business rules can be written as follows.

A customer can download many e-books from Books Online and each of the books can be downloaded by many customers.

Crow’s Foot ERD:

The business rule is an airline can be assigned to fly many flights but each flight is flown by only one airliner.

Crow’s Foot ERD:

The business rule for “KwikTite” Corporation is as follows.

Each factory is located in a region and each region can be a home for many factories.

Each factory employs many employees but each employee is employed by only one factory.

Crow’s Foot ERD:

The business rule is an employee may have earned many degrees and each degree may have been earned by many employees.

Crow’s Foot ERD: