> How does mysql unwrite the deposit? Yes, the database either reverses the changes. https://en.wikipedia.org/wiki/Transaction_log https://en.wikipedia.org/wi

> How does mysql unwrite the deposit? Yes, the database either reverses the changes. https://en.wikipedia.org/wiki/Transaction_log https://en.wikipedia.org/wiki/Transaction_log If, after a start, the database is found in an inconsistent state or not been shut down properly, the database management system reviews the database logs for uncommitted transactions and rolls back the changes made by these transactions. Additionally, all transactions that are already committed but whose changes were not yet materialized in the database are re-applied. Both are done to ensure atomicity and durability of transactions.