Rollback in DBMS
In database management systems (DBMS), a rollback is an operation that allows the database to be returned to a previous state. This is crucial for maintaining database integrity, as it enables the system to recover from errors, crashes, or incorrect operations). When a rollback is performed, all data changes since the last transaction start or begin are discarded, effectively reverting the database to its state before those changes were made).
In SQL, the ROLLBACK command is used to undo transactions that have not been saved in the database, effectively restoring the database to its previous state. It is important to note that a ROLLBACK statement will also release any existing savepoints that may be in use).
In summary, a rollback in DBMS is a fundamental feature that ensures database integrity and allows for the recovery of the database to a consistent state after errors or crashes. It is a critical aspect of transaction management in database systems.
