Name the main properties of a transaction.

The main properties of transactions in databases, often described by the acronym ACID:

• Atomicity: A transaction is either fully completed or not executed at all. Partial execution is not allowed. In case of failure, all changes made by the transaction are rolled back.

• Consistency: A transaction transitions the database from one consistent state to another. It must not violate data integrity rules (constraints, triggers, etc.).

• Isolation: The execution of one transaction should not affect the execution of other parallel transactions until it is completed. Each transaction sees the database in the state before other unfinished transactions.

• Durability: After a transaction successfully completes, its changes must be permanent and cannot be lost due to system failures (power outages, hardware failures, etc.).

These properties ensure reliable data processing in database management systems.