Starting Out with Java: Early Objects, Student Value Edition (6th Edition)
6th Edition
ISBN: 9780134457918
Author: GADDIS, Tony
Publisher: PEARSON
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Textbook Question
Chapter 1.5, Problem 1.13CP
What is a compiler?
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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 1 Solutions
Starting Out with Java: Early Objects, Student Value Edition (6th Edition)
Ch. 1.3 - Why is the computer used by so many different...Ch. 1.3 - List the five major hardware components of a...Ch. 1.3 - Internally, the CPU consists of what two units?Ch. 1.3 - Prob. 1.4CPCh. 1.3 - Prob. 1.5CPCh. 1.3 - Prob. 1.6CPCh. 1.3 - What does the term multitasking mean?Ch. 1.5 - Describe the difference between a key word and a...Ch. 1.5 - Prob. 1.9CPCh. 1.5 - Describe the difference between a program line and...
Ch. 1.5 - Prob. 1.11CPCh. 1.5 - What happens to a variables current contents when...Ch. 1.5 - What is a compiler?Ch. 1.5 - Prob. 1.14CPCh. 1.5 - What is byte code?Ch. 1.5 - Prob. 1.16CPCh. 1.6 - What four items should you identify when defining...Ch. 1.6 - Prob. 1.18CPCh. 1.6 - What is pseudocode?Ch. 1.6 - Describe what a compiler does with a programs...Ch. 1.6 - Prob. 1.21CPCh. 1.6 - Is a syntax error (such as misspelling a key word)...Ch. 1.6 - What is the purpose of testing a program with...Ch. 1.7 - Prob. 1.24CPCh. 1.7 - Prob. 1.25CPCh. 1.7 - Prob. 1.26CPCh. 1.7 - Prob. 1.27CPCh. 1.7 - Prob. 1.28CPCh. 1 - Prob. 1MCCh. 1 - A byte is made up of eight a. CPUs b. addresses c....Ch. 1 - Each byte is assigned a unique a. address b. CPU...Ch. 1 - Prob. 4MCCh. 1 - If you were to look at a machine language program,...Ch. 1 - These are words that have a special meaning in the...Ch. 1 - These are symbols or words that perform operations...Ch. 1 - These characters serve specific purposes, such as...Ch. 1 - These are words or names that are used to identify...Ch. 1 - Prob. 10MCCh. 1 - Prob. 11MCCh. 1 - Prob. 12MCCh. 1 - Prob. 13MCCh. 1 - The following pseudocode algorithm has an error....Ch. 1 - Available Credit A program that calculates a...Ch. 1 - Sales Tax A program that calculates the total of a...Ch. 1 - Account Balance A program that calculates the...Ch. 1 - The variable x starts with the value 0. The...Ch. 1 - The variable a starts with the value 10. The...Ch. 1 - Prob. 1SACh. 1 - Prob. 2SACh. 1 - What is the difference between operating system...Ch. 1 - Prob. 4SACh. 1 - Why must programs written in a high-level language...Ch. 1 - Why is it easier to write a program in a...Ch. 1 - What is a source file?Ch. 1 - Prob. 8SACh. 1 - What is an algorithm?Ch. 1 - What is a compiler?Ch. 1 - What must a computer have in order for it to...Ch. 1 - What is the difference between machine language...Ch. 1 - Why does byte code make Java a portable language?Ch. 1 - Prob. 14SACh. 1 - Prob. 15SACh. 1 - What part of an object forms an interface through...Ch. 1 - Prob. 17SACh. 1 - What is a class?Ch. 1 - How is a class different from an object?Ch. 1 - What object-oriented programming characteristic...Ch. 1 - What type of program do you use to write Java...Ch. 1 - Will the Java compiler translate a source file...Ch. 1 - What does the Java compiler translate Java source...Ch. 1 - Prob. 24SACh. 1 - Prob. 25SACh. 1 - Your First Java Program This assignment will help...
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