Final answer:
An atomic transaction is the type of transaction where no operation within it needs to be rolled back, ensuring all operations are completed or none at all, while also maintaining the integrity and consistency of the database.
Step-by-step explanation:
The transaction where no operation needs to be rolled back is referred to as an Atomic transaction. In the context of database transactions, atomicity is one of the ACID properties which guarantees that transactions are completed in an all-or-nothing manner. If a transaction is atomic, it means that either all of the operations within that transaction are successfully completed and committed, resulting in a new consistent state, or if any operation fails, all changes are rolled back to the previous consistent state as if the transaction never occurred. This ensures that the database remains free from partial updates that could leave the data in an inconsistent state. An atomic transaction is like a guarantee ensuring that a series of database operations either complete fully or not at all.In contrast, a Consistent transaction refers to the state where a transaction leaves the database in a consistent state if it was consistent when the transaction started. An Isolated transaction maintains operation isolation and ensures that concurrently executing transactions do not affect each other. Lastly, a Durable transaction ensures that once a transaction has been committed, it will remain so, even in the case of a system failure.In conclusion, the atomic transaction is the type where no rollback is required provided that the transaction is successful, which upholds the integrity and consistency of a database.