SQL COMMIT vs ROLLBACK: Key Differences Explained
SQL COMMIT makes every change since the last COMMIT permanent; ROLLBACK undoes them all, restoring the database to that previous point.
People mix them up because both end a transaction, yet one saves your work and the other erases it—like clicking “save” versus “undo”—and the consequences are invisible until you look at the data.
Key Differences
COMMIT finalizes inserts, updates, deletes; once issued, they cannot be reversed without a restore. ROLLBACK reverts them instantly, leaving no trace and freeing locks. COMMIT requires a successful transaction; ROLLBACK can run even after errors.
Which One Should You Choose?
Use COMMIT when data integrity checks pass and you want the world to see the changes. Use ROLLBACK the moment an error, constraint violation, or business rule fails—it’s your panic button.
Examples and Daily Life
ATM withdrawal: COMMIT after cash dispensed. E-commerce checkout: ROLLBACK if payment gateway times out. Bank transfer app: COMMIT only after both debit and credit succeed.
Can I use COMMIT and ROLLBACK in the same transaction?
Yes; you can ROLLBACK to savepoints within a transaction, then COMMIT the final state, giving fine-grained control.
Does ROLLBACK undo CREATE TABLE?
In most databases, DDL like CREATE TABLE auto-COMMIT, so ROLLBACK won’t erase it; always check your engine’s rules.