DATABASE CONCEPTS CUSTOM
8th Edition
ISBN: 9780134639864
Author: KROENKE
Publisher: PEARSON C
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Chapter 4, Problem 4.14RQ
Explanation of Solution
Relationship:
An association between several entities is termed as relationship.
- It is used to link the attributes in entities.
- It is represented in a “diamond” box with name of the relationship in Entity-Relationship diagram.
The following diagram demonstrates the “relationship” among entities.
Degree of relationship:
Degree of relationship is a number of entity classes that participate in a relationship. The relationship can be divided into two ways based on the degree of the relationship...
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Chapter 4 Solutions
DATABASE CONCEPTS CUSTOM
Ch. 4 - Prob. 4.1RQCh. 4 - Prob. 4.2RQCh. 4 - Prob. 4.3RQCh. 4 - What is a use case, and what is its purpose?Ch. 4 - Give an example of a data constraint.Ch. 4 - Prob. 4.6RQCh. 4 - Define the term entity, and give an example other...Ch. 4 - Explain the difference between an entity class and...Ch. 4 - Define the term attribute, and give examples for...Ch. 4 - Define the term identifier, and indicate which...
Ch. 4 - Prob. 4.11RQCh. 4 - Prob. 4.12RQCh. 4 - Prob. 4.13RQCh. 4 - Prob. 4.14RQCh. 4 - List and give an example of the three types of...Ch. 4 - Prob. 4.16RQCh. 4 - Prob. 4.17RQCh. 4 - Prob. 4.18RQCh. 4 - Define the term weak entity, and give an example...Ch. 4 - Explain the ambiguity in the definition of the...Ch. 4 - Define the term associative entity, and give an...Ch. 4 - Define the terms supertype, subtype, and...Ch. 4 - What is an exclusive subtype relationship? Give an...Ch. 4 - What is an inclusive subtype relationship? Give an...Ch. 4 - Prob. 4.25RQCh. 4 - Prob. 4.26RQCh. 4 - Prob. 4.27RQCh. 4 - Prob. 4.28RQ
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- Implement the code In MATLAB and send a picture of the Implementation from within the program MATLAB code to detect magnetic materials % Assume we have a reading from a magnetic % sensor magnetic field = 0.8; % Magnetic field strength in Tesla If the material is magnetic (like iron), % there will be a higher reading if magnetic field > 0.5 'material = 'Magnetic (Metal) material = 'Non-Magnetic (Plastic/ else ; 'Wood) end ;disp(['The material is: ', material])arrow_forwardImplement the code in MATLAB and send a picture of the implementation from within the program MATLAB code to calculate material density % and classify based on weight Assume we have the material's weight and % volume weight volume = 5; % Weight in kilograms = 2; % Volume in cubic meters Calculate the density % ; density = weight volume Classify materials based on density % if density 7 ; 'material = 'Metal ; 'material = 'Wood else end ; disp(['The material is: ', material])arrow_forwardpicture of the implementation from within the program > magnetic Field Strength; // Classify material based on magnetic field strength } if (magnetic FieldStrength > 0.3) cout << "The material is Metal" << ; endl } else { cout << "The material is Non-metal" ;<< endl { ; return 0 {arrow_forward
- Implement the code In C++ and send a picture of the Implementation from within the program > weight ;" :cout >volume Calculate density // ; density = weight / volume Classify materials based on density // } if (density 7) { cout << "The material is Metal" << cout << "The material is Wood" << ; endl } else { ; endl { ; return 0 {arrow_forwardGeneral Ford produces cars at L.A. and Detroit and has a warehouse in Atlanta; the companysupplies cars to customers in Houston and Tampa. The cost of shipping a car between points isgiven in Table 60 (“—” means that a shipment is not allowed). L.A. can produce as many as 1,100cars, and Detroit can produce as many as 2,900 cars. Houston must receive 2,400 cars, and Tampamust receive 1,500 cars.a Formulate a balanced transportation problem that can be used to minimize the shipping costsincurred in meeting demands at Houston and Tampa.b Modify the answer to part (a) if shipments between L.A. and Detroit are not allowed.c Modify the answer to part (a) if shipments between Houston and Tampa are allowed at a cost of$5. show all the steps. provide x_ij c_ij objective function and constraintsarrow_forwardGiven function: ~ 2.4 2 + cos( 1 + x³/2) 0.5x dx I = √1 + 0.5 sin x 1. Approximate the integral value of the given function using multiple application Trapezoidal Rule for n = 3, 6, 12 and 24 segments. Show the detailed tabulated results like in the lesson. 2. Improve the integral estimate value of the Trapezoidal rule using Romberg integration. Show the step by step solution for the different extrapolation order of k. Show detailed extrapolation table results like in the lesson. 3. Approximate the first derivative of the given function using the following step sizes h = 0.5 and h = 0.25 at an xi = 0.8 for the truncated forward, backward and centered finite divided difference. Show the detailed step by step solution like in the lesson.arrow_forward
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