How transactions work

You'll understand what a transaction is: a bundle of database operations that either all succeed together or all fail together, keeping your data reliable.

You'll learn the four core phases—begin, execute, commit, and rollback—that govern how transactions move through a database system.

You'll grasp Atomicity and Consistency, the first two ACID pillars that ensure transactions are all-or-nothing and leave data in a valid state.

You'll see how isolation prevents interference between concurrent transactions and how two-phase commit keeps distributed systems in sync.