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Questions and Answers
Which of the following is NOT a database operation that forms a transaction?
Where can the database operations forming a transaction be specified?
What is a transaction in the context of database processing?
In the context of database processing, what is the purpose of specifying explicit begin transaction and end transaction statements in an application program?
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How are database access operations between explicit begin transaction and end transaction statements considered?
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Can a single application program contain more than one transaction if it contains several transaction boundaries?
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Study Notes
Database Transactions
- A transaction in database processing is a sequence of operations that are treated as a single unit. It ensures data integrity and consistency.
- Common database operations that form a transaction include INSERT, UPDATE, DELETE, and SELECT. Operations not typically included may be trivial tasks that do not affect data integrity.
Transaction Boundaries
- Explicit BEGIN TRANSACTION and END TRANSACTION statements delineate the start and end of a transaction, allowing for clear definition of transactional boundaries within application programs.
- Operations executed between BEGIN TRANSACTION and END TRANSACTION statements are considered part of that transaction. These operations are subject to the ACID properties (Atomicity, Consistency, Isolation, Durability).
Multiple Transactions
- A single application program can contain multiple transactions, each defined by separate transaction boundaries. This allows for complex operations while maintaining logical separation and data integrity throughout the program.
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Description
Test your knowledge of database transactions with this quiz. Explore the concepts of insertion, deletion, modification, and retrieval operations within a logical unit of work. Dive into the details of how transactions can be embedded within application programs or specified interactively via high-level query languages.
