Description: A nested transaction is a concept in the field of databases that refers to a transaction initiated within another transaction. This approach allows operations to be grouped hierarchically, where a main transaction can contain multiple sub-transactions. Nested transactions are useful for managing complex operations, as they provide more granular control over error handling and data recovery. If a sub-transaction fails, it is possible to roll back only that part without affecting the main transaction, which enhances the system’s robustness. Additionally, nested transactions can facilitate code organization and business logic, allowing developers to structure their applications more efficiently. In terms of performance, using nested transactions can optimize database access, as it allows for batch operations and reduces the number of commits required. However, their implementation must be handled carefully, as poor management can lead to concurrency issues and resource locking.
