Starting Out with C++ from Control Structures to Objects Plus MyLab Programming with Pearson eText -- Access Card Package (9th Edition)
9th Edition
ISBN: 9780134544847
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 50RQE
T F A member function of a derived class may not have the same name as a member function of the base class.
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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'.
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Chapter 15 Solutions
Starting Out with C++ from Control Structures to Objects Plus MyLab Programming with Pearson eText -- Access Card Package (9th Edition)
Ch. 15.1 - Here is the first line of a class declaration....Ch. 15.1 - What is the name of the derived class in the...Ch. 15.1 - Suppose a program has the following class...Ch. 15.2 - What is the difference between private members and...Ch. 15.2 - What is the difference between member access...Ch. 15.2 - Suppose a program has the following class...Ch. 15.3 - What will the following program display? #include...Ch. 15.3 - What will the following program display? #include...Ch. 15.7 - Explain the difference between overloading a...Ch. 15.7 - Prob. 15.10CP
Ch. 15.7 - Prob. 15.11CPCh. 15.7 - What will the following program display? #include...Ch. 15.7 - What will the following program display? #include...Ch. 15.7 - What will the following program display? #include...Ch. 15.7 - What will the following program display? #include...Ch. 15.8 - Does the following diagram depict multiple...Ch. 15.8 - Does the following diagram depict multiple...Ch. 15.8 - Examine the following classes. The table lists the...Ch. 15.8 - Examine the following class declarations: class...Ch. 15 - What is an is a relationship?Ch. 15 - A program uses two classes: Dog and Poodle. Which...Ch. 15 - How does base class access specification differ...Ch. 15 - What is the difference between a protected class...Ch. 15 - Can a derived class ever directly access the...Ch. 15 - Which constructor is called first, that of the...Ch. 15 - What is the difference between redefining a base...Ch. 15 - Prob. 8RQECh. 15 - What is an abstract base class?Ch. 15 - A program has a class Potato, which is derived...Ch. 15 - What base class is named in the line below?class...Ch. 15 - What derived class is named in the line below?...Ch. 15 - What is the class access specification of the base...Ch. 15 - What is the class access specification of the base...Ch. 15 - Protected members of a base class are like...Ch. 15 - Complete the table on the next page by filling in...Ch. 15 - Complete the table below by filling in private,...Ch. 15 - Complete the table below by filling in private,...Ch. 15 - A derived class inherits the ________ of its base...Ch. 15 - When both a base class and a derived class have...Ch. 15 - An overridden base class function may be called by...Ch. 15 - When a derived class redefines a function in a...Ch. 15 - A(n) __________ member function in a base class...Ch. 15 - ________ binding is when the compiler binds member...Ch. 15 - __________ binding is when a function call is...Ch. 15 - _________ is when member functions in a class...Ch. 15 - When a pointer to a base class is made to point to...Ch. 15 - A(n) __________ class cannot be instantiated.Ch. 15 - A(n) _______ function has no body, or definition,...Ch. 15 - A(n) _________ of inheritance is where one class...Ch. 15 - _______ is where a derived class has two or more...Ch. 15 - In multiple inheritance, the derived class should...Ch. 15 - Write the first line of the declaration for a...Ch. 15 - Write the first line of the declaration for a...Ch. 15 - Suppose a class named Tiger is derived from both...Ch. 15 - Write the declaration for class B. The classs...Ch. 15 - T F The base classs access specification affects...Ch. 15 - T F The base classs access specification affects...Ch. 15 - T F Private members of a private base class become...Ch. 15 - T F Public members of a private base class become...Ch. 15 - T F Protected members of a private base class...Ch. 15 - T F Public members of a protected base class...Ch. 15 - T F Private members of a protected base class...Ch. 15 - T F Protected members of a public base class...Ch. 15 - T F The base class constructor is called after the...Ch. 15 - T F The base class destructor is called after the...Ch. 15 - T F It isnt possible for a base class to have more...Ch. 15 - T F Arguments are passed to the base class...Ch. 15 - T F A member function of a derived class may not...Ch. 15 - Prob. 51RQECh. 15 - T F A base class may not be derived from another...Ch. 15 - class Car, public Vehicle { public: Car(); Car();...Ch. 15 - class Truck, public : Vehicle, protected {...Ch. 15 - class SnowMobile : Vehicle { protected: int...Ch. 15 - class Table : public Furniture { protected: int...Ch. 15 - class Tank : public Cylinder { private: int...Ch. 15 - class Three : public Two : public One { protected:...Ch. 15 - Employee and ProductionWorker Classes Design a...Ch. 15 - ShiftSupervisor Class In a particular factory, a...Ch. 15 - TeamLeader Class In a particular factory, a team...Ch. 15 - Prob. 4PCCh. 15 - Time Clock Design a class named TimeClock. The...Ch. 15 - Essay Class Design an Essay class that is derived...Ch. 15 - PersonData and CustoraerData Classes Design a...Ch. 15 - PreferredCustomer Class A retail store has a...Ch. 15 - File Filter A file filter reads an input file,...Ch. 15 - File Double-Spacer Create a derived class of the...Ch. 15 - Course Grades In a course, a teacher gives the...Ch. 15 - Ship. CruiseShip, and CargoShip Classes Design a...Ch. 15 - Pure Abstract Base Class Project Define a pure...Ch. 15 - Prob. 14PC
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