Starting Out with Python (4th Edition)
4th Edition
ISBN: 9780134444321
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 5.9, Problem 36CP
Write a statement that uses a math module function to convert 45 degrees to radians and assigns the value to a variable.
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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 5 Solutions
Starting Out with Python (4th Edition)
Ch. 5.1 - What is a function?Ch. 5.1 - Prob. 2CPCh. 5.1 - How do functions help you reuse code in a program?Ch. 5.1 - How can functions make the development of multiple...Ch. 5.1 - How can functions make it easier for programs to...Ch. 5.2 - A function definition has what two parts?Ch. 5.2 - What does the phrase calling a function mean?Ch. 5.2 - When a function is executing, what happens when...Ch. 5.2 - Prob. 9CPCh. 5.4 - What is a local variable? How is access to a local...
Ch. 5.4 - What is a variables scope?Ch. 5.4 - Prob. 12CPCh. 5.5 - What are the pieces of data that are passed into a...Ch. 5.5 - What are the variables that receive pieces of data...Ch. 5.5 - Prob. 15CPCh. 5.5 - When a parameter is changed, does this affect the...Ch. 5.5 - The following statements call a function named...Ch. 5.6 - What is the scope of a global variable?Ch. 5.6 - Give one good reason that you should not use...Ch. 5.6 - Prob. 20CPCh. 5.7 - How does a value-returning function differ from...Ch. 5.7 - Prob. 22CPCh. 5.7 - Prob. 23CPCh. 5.7 - What does the following statement do? x =...Ch. 5.7 - What does the following statement do? print...Ch. 5.7 - What does the following statement do? print...Ch. 5.7 - What does the following statement do? print...Ch. 5.7 - What does the following statement do? print...Ch. 5.7 - When the random module is imported, what does it...Ch. 5.7 - What happens if the same seed value is always used...Ch. 5.8 - Prob. 31CPCh. 5.8 - Look at the following function definition: def...Ch. 5.8 - What is a Boolean function?Ch. 5.9 - What import statement do you need to write in a...Ch. 5.9 - Write a statement that uses a math module function...Ch. 5.9 - Write a statement that uses a math module function...Ch. 5 - A group of statements that exist within a program...Ch. 5 - A design technique that helps to reduce the...Ch. 5 - The first line of a function definition is known...Ch. 5 - You___a function to execute it. a. define b. call...Ch. 5 - A design technique that programmers use to break...Ch. 5 - Prob. 6MCCh. 5 - A ______ is a variable that is created inside a...Ch. 5 - Prob. 8MCCh. 5 - Prob. 9MCCh. 5 - Prob. 10MCCh. 5 - A variable that is visible to every function in a...Ch. 5 - Prob. 12MCCh. 5 - This is a prewritten function that is built into a...Ch. 5 - This standard library function returns a random...Ch. 5 - This standard library function returns a random...Ch. 5 - This standard library function returns a random...Ch. 5 - This statement causes a function to end and sends...Ch. 5 - This is a design tool that describes the input,...Ch. 5 - This type of function returns either True or...Ch. 5 - This is a math module function. a. derivative b....Ch. 5 - The phrase "divide and conquer" means that all of...Ch. 5 - Functions make it easier for programmers to work...Ch. 5 - Function names should be as short as possible.Ch. 5 - Calling a function and defining a function mean...Ch. 5 - A flowchart shows the hierarchical relationships...Ch. 5 - A hierarchy chart does not show the steps that are...Ch. 5 - A statement in one function can access a local...Ch. 5 - In Python, you cannot write functions that accept...Ch. 5 - In Python, you can specify which parameter an...Ch. 5 - You cannot have both keyword arguments and...Ch. 5 - Some library functions are built into the Python...Ch. 5 - You do not need to have an import statement in a...Ch. 5 - Complex mathematical expressions can sometimes be...Ch. 5 - A function in Python can return more than one...Ch. 5 - IPO charts provide only brief descriptions of a...Ch. 5 - How do functions help you to reuse code in a...Ch. 5 - Name and describe the two parts of a function...Ch. 5 - When a function is executing, what happens when...Ch. 5 - What is a local variable? What statements are able...Ch. 5 - What is a local variable's scope?Ch. 5 - Prob. 6SACh. 5 - Suppose you want to select a random number from...Ch. 5 - What statement do you have to have in a...Ch. 5 - What three things are listed on an IPO chart?Ch. 5 - What is a Boolean function?Ch. 5 - Prob. 11SACh. 5 - Write a function named times_ten. The function...Ch. 5 - Examine the following function header, then write...Ch. 5 - Look at the following function header: der...Ch. 5 - What will the following program display? def main...Ch. 5 - Look at the following function definition def...Ch. 5 - Write a statement that generates a random number...Ch. 5 - The following statement calls a function named...Ch. 5 - A program contains the following function...Ch. 5 - Write a function named times_ten that accepts a...Ch. 5 - Write a function named get_first_name that asks...Ch. 5 - Kilometer Converter The Kilometer Converter...Ch. 5 - Sales Tax Program Refactoring Programming Exercise...Ch. 5 - How Much Insurance? Many financial experts advise...Ch. 5 - Automobile Costs Write a program that asks the...Ch. 5 - Property Tax A county collects property taxes on...Ch. 5 - Calories from Fat and Carbohydrates A nutritionist...Ch. 5 - Stadium Seating There are three seating categories...Ch. 5 - Paint Job Estimator A painting company has...Ch. 5 - Monthly Sales Tax A retail company must file a...Ch. 5 - Feet to Inches The Feet to Inches Problem One foot...Ch. 5 - Math Quiz Write a program that gives simple math...Ch. 5 - Maximum of Two Values Write a function named max...Ch. 5 - Falling Distance When an object is falling because...Ch. 5 - Kinetic Energy In physics, an object that is in...Ch. 5 - Test Average and Grade Write a program that asks...Ch. 5 - Odd/Even Counter In this chapter, you saw an...Ch. 5 - Prime Numbers A prime number is a number that is...Ch. 5 - Prime Number List This exercise assumes that you...Ch. 5 - Future Value Suppose you have a certain amount of...Ch. 5 - Random Number Guessing Game Write a program that...Ch. 5 - Rock, Paper, Scissors Game Write a program that...Ch. 5 - Turtle Graphics: Triangle Function Write a...Ch. 5 - Turtle Graphics: Modular Snowman Write a program...Ch. 5 - Prob. 24PECh. 5 - Turtle Graphics: Checkerboard Write a turtle...Ch. 5 - Turtle Graphics: City Skyline Write a turtle...
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- 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.arrow_forwardConsider 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.arrow_forwardThe following relations keep track of airline flight information: Flights(flno: integer, from: string, to: string, distance: integer, departs: time, arrives: time, price: integer) Aircraft(aid: integer, aname: string, cruisingrange: integer) Certified(eid: integer, aid: integer) Employees(eid: integer, ename: string, salary: integer) Note that the Employees relation describes pilots and other kinds of employees as well; every pilot is certified for some aircraft, and only pilots are certified to fly. Write each of the following queries in SQL.(Additional queries using the same schema are listed in the exercises for Chapter 4) a. Identify the routes that can be piloted by every pilot who makes more than $100,000. b. Print the name and salary of every nonpilot whose salary is more than the average salary for pilots. c. Print the names of employees who are certified only on aircrafts with cruising range longer than 1000 miles and who are certified on some Boeing…arrow_forward
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