What does ACID stand for in the context of OLTP databases?

In the context of OLTP (Online Transaction Processing) databases, ACID stands for Atomicity, Consistency, Isolation, Durability. This set of properties is fundamental in ensuring reliable processing of transactions in a database.

• Atomicity ensures that each transaction is treated as a single, indivisible unit. If any part of the transaction fails, the entire transaction is rolled back, preventing partial updates that could lead to data inconsistency.

• Consistency guarantees that a transaction takes the database from one valid state to another, maintaining the integrity of the data. It ensures that any transaction will bring the database into a state that adheres to all defined rules, constraints, and conditions.

• Isolation provides a mechanism to ensure that concurrent transactions do not interfere with each other. It ensures that the execution of one transaction is isolated from others, preventing issues that can arise from simultaneous operations.

• Durability states that once a transaction has been committed, it remains so, even in the event of a system failure. This guarantees that the changes made by a transaction are permanently recorded in the database.

Understanding these properties helps to ensure that data integrity is maintained while allowing for efficient transaction processing, which is critical in OLTP systems. The other options present variations that do not