Question

Explain the ACID properties of transactions with the help of an example of each.

13 Sep 2024
Answer :
Word Count : 913

In the context of Database Management Systems (DBMS), a transaction is a sequence of operations that performs a logical unit of work. Transactions must adhere to a set of properties to ensure the integrity, consistency, and reliability of the database, even in the event of system failures. These properties are known as ACID properties, an acronym that stands for Atomicity, Consistency, Isolation, and Durability. Let’s explore each of these properties with examples:

### Atomicity

Atomicity refers to the "all-or-nothing" nature of a transaction. It ensures that either all operations within a transaction are completed successfully, or none of them are applied to the database. If a transaction cannot be completed successfully, the DBMS guarantees that the database state remains unchanged, as if the transaction never happened.

Example:  
Consider a bank transaction where John is transferring $500 to Mary. The transaction involves two operations:
1. Deduct $500 from John's account.
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Explain the ACID properties of transactions with the help of an example of each.

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