Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 3, Problem 3.5RQ
Program Plan Intro
Business rules:
The two business rules given in this chapter are given below:
Rule 1:
If an “EMPLOYEE” table has to be removed from the
Rule 2:
If a “PROJECT” row needs to be deleted that is linked with any “ASSIGNMENT”, then the “PROJECT” row and the connected “ASSIGNMENT” rows can be deleted.
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Write the business rules that are reflected in the ERD shown in Figure P2.15. (Note that the ERD reflects some simplifying assumptions. For example, each book is written by only one author. Also, remember that the ERD is always read from the “1” to the “M” side, regardless of the orientation of the ERD components.)
FIGURE P2.15 THE CROW’S FOOT ERD FOR PROBLEM 15
Create an ERD based on the Crow's Foot notation, using the following requirements:-
Scenic Tours LLC (STLLC) provides guided tours to groups of visitors to the Washington D.C. area. In
recent years, STLLC has grown quickly and is having difficulty keeping up with all of the various
information needs of the company. The company's operations are as follows.
STLLC offers many different tours. For each tour, the tour name, approximate length (in hours), and
fee charged is needed. Guides are identified by an employee ID, but the system should also record a
guide's name, home address, and date of hire. Guides take a test to be qualified to lead specific
tours. It is important to know which guides are qualified to lead which tours and the date that they
completed the qualification test for each tour. A guide may be qualified to lead many different tours.
A tour can have many different qualified guides. New guides may or may not be qualified to lead any
tours, just as a new tour may or may not…
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Chapter 3 Solutions
Database Concepts (8th Edition)
Ch. 3 - Prob. 3.1RQCh. 3 - What is a data sublanguage?Ch. 3 - Prob. 3.3RQCh. 3 - Prob. 3.4RQCh. 3 - Prob. 3.5RQCh. 3 - Why do some standard SQL-92 statements fail to run...Ch. 3 - Use the following tables for your answers to...Ch. 3 - Write an SQL CREATE TABLE statement to create the...Ch. 3 - Prob. 3.9RQCh. 3 - Prob. 3.10RQ
Ch. 3 - Prob. 3.11RQCh. 3 - Is PET or PET_2 a better design? Explain your...Ch. 3 - Prob. 3.13RQCh. 3 - Prob. 3.14RQCh. 3 - Prob. 3.15RQCh. 3 - Prob. 3.16RQCh. 3 - Prob. 3.17RQCh. 3 - Write an SQL statement to display the breed, type,...Ch. 3 - Prob. 3.19RQCh. 3 - Prob. 3.20RQCh. 3 - Write an SQL statement to display the breed, type,...Ch. 3 - Write an SQL statement to display the name, breed,...Ch. 3 - Write an SQL statement to display the pet ID,...Ch. 3 - Prob. 3.24RQCh. 3 - Prob. 3.25RQCh. 3 - Write an SQL statement to display the name and...Ch. 3 - Prob. 3.27RQCh. 3 - Write an SQL statement to count the number of...Ch. 3 - Write an SQL statement to count the number of...Ch. 3 - Prob. 3.30RQCh. 3 - Prob. 3.31RQCh. 3 - Prob. 3.32RQCh. 3 - Prob. 3.33RQCh. 3 - Answer question 3.33, but do not consider any pet...Ch. 3 - Write an SQL statement to display the last name,...Ch. 3 - Write an SQL statement to display the last name,...Ch. 3 - Write SQL statements to (1) create the BREED...Ch. 3 - Prob. 3.38RQCh. 3 - Prob. 3.39RQCh. 3 - Prob. 3.40RQCh. 3 - Write an SQL statement to display the...Ch. 3 - Write SQL statements to add three new rows to the...Ch. 3 - Write SQL statements to add three new rows to the...Ch. 3 - Write an SQL statement to change the value of Std....Ch. 3 - Explain what will happen if you leave the WHERE...Ch. 3 - Prob. 3.46RQCh. 3 - Prob. 3.47RQCh. 3 - Prob. 3.48RQ
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- Create the ERD. (Hint: Look at the table contents. You will discover that an AIRCRAFT can fly many CHARTER trips but that each CHARTER trip is flown by one AIRCRAFT, that a MODEL references many AIRCRAFT but that each AIRCRAFT references a single MODEL, and so on.)arrow_forwardExplain the procedures needed in changing the context.arrow_forward23arrow_forward
- What precisely does the phrase "requirements must be broad and consistent" mean?arrow_forward21. Row is synonymous with the term: a. record b. relation c. column d. fieldarrow_forwardCreate a basic ERD given the following business rule: A store can employ one or many employees, but each employee can work for only one store.arrow_forward
- write the schema that descibes the following relations: 1- The course relation course id title dept.name credits Intro. to Biology Biology Biology Biology Comp. Sci. Comp. Sci. Comp. Sci. Comp. Sci. Comp. Sci. Elec. Eng. BIO-101 4 BIO-301 BIO-399 CS-101 CS-190 CS-315 CS-319 Genetics 4 Computational Biology Intro. to Computer Science Game Design Robotics 3. 4. 4 Image Processing Database System Concepts Intro. to Digital Systems Investment Banking World History Music Video Production CS-347 ЕЕ-181 FIN-201 3 3 Finance HIS-351 MU-199 PHY-101 History Music Physical Principles Physics 4arrow_forwardAll entity names, relationship names, and attribute definitions must be correct.arrow_forwardWhen would it be reasonable to make the assumption that two select statements drawn from the same database are consistent with one another? What type of circumstances would warrant such a reasonable assumption?arrow_forward
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