How are transactions handled in the database?

Transactions in the database are processed through the following steps:

1. Starting a transaction: The beginning of a transaction signals the database system to start recording all operations on the database, ensuring their consistency until the transaction is complete.
2. Perform transactional operations: executing a series of database operations within a transaction, such as inserting, updating, or deleting data.
3. Commit transaction: Once all transaction operations have been successfully executed, the transaction can be committed. Committing the transaction will permanently save all operation results in the database and release any locked resources.
4. Rollback transaction: If an error occurs during the execution of a transaction or if the transaction is not successfully completed, you can choose to rollback the transaction. The rollback operation will undo all transaction actions, restoring the database to its state before the transaction began.
5. Finish transaction: Once a transaction is successfully committed or rolled back, the transaction is complete. Ending the transaction will release resources occupied in the database system such as locked data.

By following the steps above, the database system can ensure the consistency, atomicity, isolation, and durability of transactions, guaranteeing the correct execution of database operations and the integrity of data.