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Questions and Answers
Which of the following is NOT a database operation that forms a transaction?
Which of the following is NOT a database operation that forms a transaction?
Where can the database operations forming a transaction be specified?
Where can the database operations forming a transaction be specified?
What is a transaction in the context of database processing?
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?
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?
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?
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.