ROLLBACK

ROLLBACK is a SQL command used to undo transactions that have not yet been committed to the database. It reverses all changes made within the current transaction, restoring the database to its state before the transaction began. This command is crucial for maintaining data integrity, especially when errors occur during a transaction or when implementing conditional logic in database operations. ROLLBACK is an essential part of the ACID (Atomicity, Consistency, Isolation, Durability) properties of database transactions, ensuring that either all changes in a transaction are applied, or none are, thus preserving data consistency.