Transaction control statements are crucial for managing database operations. They allow you to finalize changes, undo mistakes, and create savepoints for partial rollbacks. These tools give you precise control over how and when your data modifications take effect.
Understanding transaction control is key to maintaining data integrity. By mastering , , and , you can ensure your database stays consistent and reliable, even when dealing with complex operations or unexpected errors.
Transaction Statements
Finalizing and Reverting Transactions
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COMMIT
statement finalizes a transaction by permanently saving all changes made during the transaction to the database
Once a transaction is committed, its effects are visible to other transactions and users
Committed changes cannot be undone, ensuring data integrity and
ROLLBACK
statement reverts all changes made during a transaction, effectively canceling the transaction
Useful when an error occurs or the transaction needs to be aborted
Rolls back the database to its state before the transaction began, leaving no trace of the uncommitted changes
Savepoints for Partial Rollbacks
SAVEPOINT
statement creates a named point within a transaction to which you can later roll back
Allows for partial rollbacks, giving more control over transaction management
Multiple savepoints can be created within a single transaction
Savepoints are useful for complex transactions where only a portion of the changes may need to be reverted
[ROLLBACK TO SAVEPOINT](https://www.fiveableKeyTerm:rollback_to_savepoint)
statement rolls back the transaction to a previously defined savepoint
Changes made after the savepoint are undone, while changes made before the savepoint remain intact
Provides a way to selectively undo parts of a transaction without completely aborting it