Commit: Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

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Answer 1

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Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

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Explain the significance of "transaction states" such as active, partial commit, failed, and terminated.

In a database transaction, the two main operations are READ and WRITE operations. So, there is a need to manage these two operations in the concurrent execution of the transactions as if these operations are not performed in an interleaved manner, and the data may become inconsistent. Consider the following scheduled transactions T1, T2, T3, and T4. T1 T2 T3 T4 Reads(X) Writes(X) Reads(Y) Writes(Y) Commit Reads(X) Time Reads(X) Writes(X) Reads(Y) Rollback Writes(Y) Writes(X) Commit • Identify all pair of transactions based on the occurred problem between two transactions (specify pairs, e.g., T1 => T2; T3=> T2; T3 =>T4; etc.). • Specify the name of a problem for each detected pair of transactions. • Justify the occurred problem for each pair of transactions.

How do "savepoints" differ from regular commit points in transaction lifecycles?

Answer 2

Question

Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

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Answer 3

Question

Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

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Answer 4

Question

Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

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Answer 5

Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

Answer 6

Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

Answer 7

Chapter 9.4, Problem 1QE

Program Plan Intro

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 9.1 - Identify two departments in a manufacturing plant...Ch. 9.1 - Prob. 2QE Ch. 9.1 - Summarize the roles of the application software...Ch. 9.2 - Prob. 1QE Ch. 9.2 - Prob. 2QE Ch. 9.2 - Prob. 4QE Ch. 9.2 - Prob. 5QE Ch. 9.2 - Prob. 6QE Ch. 9.3 - Prob. 1QE Ch. 9.3 - What is a persistent object?

Commit: Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

Solution Summary: The author explains that a commit is used to save any transaction permanently into the database and once it is stored it cannot be rolled back. The commit point is the final stage of transaction.

Commit:

Commit is used to save any transaction permanently into the database and once it is stored in the database it cannot be rolled back.

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