Database Systems: Design, Implementation & Management
13th Edition
ISBN: 9781337670562
Author: Coronel
Publisher: Cengage
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Chapter 10, Problem 1RQ
Explanation of Solution
Explanation of the given statement:
The given statement is “A transaction is a logical unit of work”. The statement describes the meaning of transaction in single statement. A transaction is a sequence of process that must be entirely completed or aborted. Intermediate states are not acceptable in the process of transaction.
- In DBMS, transaction act as a unit of logical related commands in which all the steps must be fully completed. If any of the SQL (Structured Query Language) command fails, the entire transaction is rolled back to the original
database . - If the transaction is acceptable by the DBMS (Database Management Systems), the transaction changes the database from one consistent state to another. To avoid inconsistent state, the DBMS must accept all database operations of the transaction are completed before the database committed.
- Consider the below example:
- The database “sales” requires a minimum of two database operations. One is creation of product and another one is payment.
- If the first operation is completed, the database will be left in an inconsistent state and the entire database is canceled. The transaction is accepted when all two operations are completed in the database.
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Students have asked these similar questions
7. Character AnalysisIf you have downloaded the source code you will find a file named text.txt in the Chapter 08 folder. Write a program that reads the file’s contents and determines the following:
The number of uppercase letters in the file
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Provide the full blue terminal commands & output and other things that are useful
Homework
You have the row vector (A) that has values from (-100 to 100),
write MATLAB codes to:
(1) Interchange the first 10 elements with last ten elements.
(2) Replace the elements at indices (93,9,17,50) of A with 99.
(3) Return the second element and the element before the last
of A as a column vector (C1).
(4) Extract the first five elements and the last five elements of A
and append them as a row vector (R).
(5) Set the elements of A with odd indices to zeros(0).
Chapter 10 Solutions
Database Systems: Design, Implementation & Management
Ch. 10 - Prob. 1RQCh. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Prob. 4RQCh. 10 - Prob. 5RQCh. 10 - Prob. 6RQCh. 10 - Prob. 7RQCh. 10 - Prob. 8RQCh. 10 - Prob. 9RQCh. 10 - Prob. 10RQ
Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - Prob. 14RQCh. 10 - Prob. 15RQCh. 10 - Prob. 16RQCh. 10 - Prob. 17RQCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11P
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