How to manage transactions in DB2
In DB2, transaction management can be performed in the following ways:
- To commit a transaction using the COMMIT command: After executing all necessary SQL statements, you can use the COMMIT command to finalize the transaction and permanently save all changes made to the database.
- Roll back a transaction using the ROLLBACK command: In case of errors during execution or the need to undo previous actions, the ROLLBACK command can be used to revert the transaction and restore the database to the state of the last committed transaction.
- To set the AUTOCOMMIT property: you can control whether transactions are automatically committed by setting the AUTOCOMMIT property to ON or OFF. With AUTOCOMMIT set to ON, each SQL statement is treated as a separate transaction to be committed. With AUTOCOMMIT set to OFF, you must explicitly use the COMMIT command to commit the transaction.
- Utilize the SAVEPOINT command to establish a savepoint: You can use the SAVEPOINT command in a transaction to set a savepoint, allowing you to rollback to that specific point instead of the entire transaction.
- Open a transaction using the BEGIN WORK or START TRANSACTION command: When carrying out a series of operations that need to be treated as a single unit, initiate a transaction using the BEGIN WORK or START TRANSACTION command, perform the necessary operations within the transaction, and then use COMMIT or ROLLBACK to either commit or rollback the transaction.