C++ for Engineers and Scientists
4th Edition
ISBN: 9781133187844
Author: Bronson, Gary J.
Publisher: Course Technology Ptr
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Chapter 7.2, Problem 3E
(Data processing) Write a
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A new application is being developed and will be using a database that includes a relation about items: Item (item_id:integer, item_name:string, color:string, price:real).
Both the purchasing department in charge of obtaining raw material and the manufacturing department in charge of manufacturing the items can change the price of manufactured items according to changes that may happen in the raw material cost or production cost. The two departments use different transactions to update the price of items. The new application uses the following sequences of actions, listed in the order they are submitted to the DBMS:
Sequence S1: T1:R(X), T2:W(X), T2:W(Y), T3:W(Y), T1:W(Y), T1:Commit, T2:Commit, T3:Commit
Sequence S2: T1:R(X), T2:W(Y), T2:W(X), T3:W(Y), T1:W(Y), T1:Commit, T2:Commit, T3:Commit
For each of the following concurrency control mechanisms, describe how they will handle each of the sequences (S1 & S2).
Strict 2PL with timestamps used for deadlock prevention.
Conservative…
As a database administrator of a large manufacturing organization, you are in charge of their website database that handles suppliers, parts, catalog, customers, and payments of delivered items. The following relations are part of the large database:
Supplier(SID, Sname, Saddress, Stelephone)Customer(CID, Cname, Caddress, Ctelephone)Part(PID, Pname, Pmodel, Pcolor)Catalog(SID, PID, Price)
(The Catalog relation lists the prices charged for parts by Suppliers).
Because the application is web-based and the database is accessed by many users, you want to increase the concurrency usage without compromising the data quality. For each of the following transactions, state the minimum SQL isolation level you would use in order to avoid any conflict problems in them. Please explain your choice.
A transaction that adds a new part to a supplier’s catalog.
A transaction that increases the price that a supplier charges for a part.
A transaction that determines the total number of items for a given…
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Chapter 7 Solutions
C++ for Engineers and Scientists
Ch. 7.1 - (Practice) Write array declarations for the...Ch. 7.1 - (Practice) Write correct notation for the first,...Ch. 7.1 - Prob. 3ECh. 7.1 - (Practice) a. Write output statements using cout...Ch. 7.1 - (Desk check) List the elements displayed by the...Ch. 7.1 - (Practice) a. Write a program to input the...Ch. 7.1 - (Practice) Write a program to input eight integer...Ch. 7.1 - (Data processing) a. Write a program to input 10...Ch. 7.1 - Prob. 9ECh. 7.1 - (Electrical eng.) Write a program that specifies...
Ch. 7.2 - (Practice) Write array declarations, including...Ch. 7.2 - (Data processing) Write an array declaration...Ch. 7.2 - (Data processing) Write a program that uses an...Ch. 7.2 - (Electrical eng.) Write a program that stores the...Ch. 7.2 - (Practice) a. Write a declaration to store the...Ch. 7.3 - (Practice) Write specification statements for the...Ch. 7.3 - (Desk check) Determine the output produced by the...Ch. 7.3 - (Practice) a. Write a C++ program that adds the...Ch. 7.3 - (Practice) Write a C++ program that adds...Ch. 7.3 - Prob. 5ECh. 7.3 - (Electrical eng.) a. An engineer has constructed a...Ch. 7.4 - Prob. 1ECh. 7.4 - Prob. 2ECh. 7.4 - Prob. 3ECh. 7.4 - Prob. 4ECh. 7.4 - Prob. 5ECh. 7.4 - (Electrical eng.) Write a program that declares...Ch. 7.4 - (Statistics) Write a program that includes two...Ch. 7.5 - Prob. 1ECh. 7.5 - (Practice) Run Program 7.10 to determine the...Ch. 7.5 - Prob. 3ECh. 7.5 - (List maintenance) a. Write a complete C++ program...Ch. 7.5 - Prob. 5ECh. 7.5 - (List maintenance) The following letters are...Ch. 7.5 - (File creation) Write a C++ program that creates...Ch. 7.5 - Prob. 8ECh. 7.5 - Prob. 9ECh. 7.5 - Prob. 10ECh. 7.5 - Prob. 11ECh. 7.5 - Prob. 12ECh. 7.5 - Prob. 13ECh. 7.5 - Prob. 14ECh. 7.5 - Prob. 15ECh. 7.6 - Prob. 1ECh. 7.6 - Prob. 2ECh. 7.6 - Prob. 3ECh. 7.6 - Prob. 4ECh. 7.6 - Prob. 5ECh. 7.6 - Prob. 6ECh. 7.6 - Prob. 7ECh. 7.6 - Prob. 8ECh. 7.6 - (Practice) Use the max_element and min_element...Ch. 7 - (Statistics) a. Write a C++ program that reads a...Ch. 7 - (Practice) Define an array named peopleTypes that...Ch. 7 - (Numerical) Given a one-dimensional array of...Ch. 7 - (Numerical) Write and test a function that returns...Ch. 7 - (Sorting) Read a set of numerical grades from the...Ch. 7 - (Numerical) a. Define an array with a maximum of...Ch. 7 - (Numerical) Using the srand() and rand() C++...Ch. 7 - (Statistical) In many statistical analysis...Ch. 7 - (Data processing) Your professor has asked you to...Ch. 7 - (Modify) Modify the program written for Exercise 9...Ch. 7 - Prob. 11PPCh. 7 - (Data processing) The answers to a true-false test...Ch. 7 - Prob. 13PPCh. 7 - (Data processing) Construct a three-dimensional...Ch. 7 - (Computation) A magic square is a square of...Ch. 7 - (Computation) Among other applications, Pascal’s...
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