Data Structures and Algorithms in Java
6th Edition
ISBN: 9781119278023
Author: Michael T. Goodrich; Roberto Tamassia; Michael H. Goldwasser
Publisher: Wiley Global Education US
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Textbook Question
Chapter 2, Problem 2R
Give an example of a software application in which adaptability can mean the difference between a prolonged lifetime of sales and bankruptcy.
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Consider the following database for some store:
Customers (cid, cname, city, discount)Agents (aid, aname, city, percent)Products (pid, pname, city, quantity, price)Orders (ordno, mon, cid, aid, pid, qty, dollars)
The relation Customers records the ID (cid), name (cname), location (city) of each customer and a discount percentage (discount) for this customer.
The relation Agents records the ID (aid), name (aname), location (city) of each agent and a transaction fee (percent) charged by this agent.
The relation Products lists the ID (pid), name (pname), location (city), quantity and price of available products.
And finally, the relation Orders contains a unique order number (ordno), the month (mon), customer (cid), agent (aid), product (pid), quantity (qty) of each order as well as the total value (dollars) of the transaction.
1. Express the following query in SQL
(a) List customers (names) who do not have discounts but purchased at least one product of price greater than $50.
(b) Find…
Consider the following relational schema and briefly answer the questions that follow:
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
a. Define a table constraint on Dept that will ensure that all managers have age > 30.
b. Write SQL statements to delete all information about employees whose salaries exceed that of the manager of one or more departments that they work in. Be sure to ensure that all the relevant integrity constraints are satisfied after your updates.
Consider the following relations:
Student(snum: integer, sname: string, rmajor: string,
level: string, age: integer)
Class(cname: string, meets_at: time, room: string, fid: integer)
Enrolled(snum: integer, cname: string)
Faculty(fid: integer, fname: string, deptid: integer)
The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class.
2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint.
(a) Every faculty member must teach at least two courses.
(b) Every student must be enrolled in the course called 'Math101'.
(c) A student cannot add more than two courses at a time…
Chapter 2 Solutions
Data Structures and Algorithms in Java
Ch. 2 - Give three examples of life-critical software...Ch. 2 - Give an example of a software application in which...Ch. 2 - Prob. 3RCh. 2 - Prob. 4RCh. 2 - Prob. 5RCh. 2 - Give a short fragment of Java code that uses the...Ch. 2 - Prob. 7RCh. 2 - Prob. 8RCh. 2 - Prob. 9RCh. 2 - Prob. 10R
Ch. 2 - Prob. 11RCh. 2 - Draw a class inheritance diagram for the following...Ch. 2 - Prob. 13RCh. 2 - Prob. 14RCh. 2 - If the parameter to the makePayment method of the...Ch. 2 - Prob. 16CCh. 2 - Most modern Java compilers have optimizers that...Ch. 2 - The PredatoryCreditCard class provides a...Ch. 2 - Modify the PredatoryCreditCard class so that a...Ch. 2 - Prob. 20CCh. 2 - Write a program that consists of three classes, A,...Ch. 2 - Prob. 22CCh. 2 - Prob. 23CCh. 2 - Write a Java class that extends the Progression...Ch. 2 - Redesign the Progression class to be abstract and...Ch. 2 - Use a solution to Exercise C-2.25 to create a new...Ch. 2 - Use a solution to Exercise C-2.25 to reimplement...Ch. 2 - Write a set of Java classes that can simulate an...Ch. 2 - Write a Java program that inputs a polynomial in...Ch. 2 - Write a Java program that inputs a document and...Ch. 2 - Prob. 31PCh. 2 - Write a Java program that simulates a system that...Ch. 2 - Define a Polygon interface that has methods area()...Ch. 2 - Prob. 35PCh. 2 - Write a Java program that can make change. Your...
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