Java How to Program, Early Objects Plus MyLab Programming with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780134800271
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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Chapter 1, Problem 7MD
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Internet of Things (IoT)
- It is a system of interrelated computing devices,
mechanical and digital machines, objects that are provided with unique identifiers and the ability to transfer data over a network. - Along with advanced data analytics, IoT enabled devices and sensors will help to reduce air pollution of world’s biggest cities.
- It also helps to improve agriculture and food supply.
- IoT enabled devices can also detect deadly viruses...
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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…
Consider the following relational schema. An employee can work in more than one department; the pct_time field of the Works relation shows the percentage of time that a given employee works in a given department.
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
Write the following queries in SQL:
a. Print the name of each employee whose salary exceeds the budget of all of the departments that he or she works in.
b. Find the enames of managers who manage only departments with budgets larger than $1 million, but at least one department with budget less than $5 million.
Consider the following schema:
Suppliers(sid: integer, sname: string, address: string)
Parts(pid: integer, pname: string, color: string)
Catalog(sid: integer, pid: integer, cost: real)
The Catalog relation lists the prices charged for parts by suppliers.
Write the following queries in SQL:
a. Find the sids of suppliers who charge more for some part than the average cost of that part (averaged over all the suppliers who supply that part).
b. Find the sids of suppliers who supply a red part or a green part.
c. For every supplier that supplies a green part and a red part, print the name and price of the most expensive part that she supplies.
Chapter 1 Solutions
Java How to Program, Early Objects Plus MyLab Programming with Pearson eText -- Access Card Package (11th Edition)
Ch. 1 - Computers process data under the control of sets...Ch. 1 - Prob. 1.2SRECh. 1 - Prob. 1.3SRECh. 1 - The programs that translate high-level language...Ch. 1 - Prob. 1.5SRECh. 1 - software is generally feature complete,...Ch. 1 - Prob. 1.7SRECh. 1 - Prob. 2.1SRECh. 1 - The command from the JDK compiles a Java program.Ch. 1 - A Java source code file must end with thefile...
Ch. 1 - When a Java program is compiled, the file produced...Ch. 1 - The file produced by the Java compiler...Ch. 1 - Prob. 3.1SRECh. 1 - Java programmers concentrate on creating, which...Ch. 1 - Prob. 3.3SRECh. 1 - A new class of objects can be created conveniently...Ch. 1 - is a graphical language that allows people who...Ch. 1 - The size, shape, color and weight of an object are...Ch. 1 - Prob. 1.1ECh. 1 - Prob. 1.2ECh. 1 - Prob. 1.3ECh. 1 - Prob. 1.4ECh. 1 - Prob. 1.5ECh. 1 - Prob. 1.6ECh. 1 - Prob. 1.7ECh. 1 - languages are most convenient to the programmer...Ch. 1 - The only language a computer can directly...Ch. 1 - Prob. 1.10ECh. 1 - Theprogramming language is now used to develop...Ch. 1 - initially became widely known as the development...Ch. 1 - Prob. 2.3ECh. 1 - Theprogramming language was developed by Bjarne...Ch. 1 - Java programs normally go through five...Ch. 1 - Prob. 3.2ECh. 1 - Prob. 3.3ECh. 1 - A(n)is a software application that simulates a...Ch. 1 - Thetakes the .class files containing the programs...Ch. 1 - Prob. 3.6ECh. 1 - Explain the two compilation phases of Java...Ch. 1 - Prob. 5ECh. 1 - Prob. 1MDCh. 1 - Prob. 2MDCh. 1 - (Attributes of Hybrid Vehicles) In this chapter...Ch. 1 - Prob. 4MDCh. 1 - Prob. 5MDCh. 1 - Prob. 6MDCh. 1 - Prob. 7MD
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