SQL Transaction Basics - Understanding DML Commands

Create a Transaction for Bank Transfer

Write a SQL transaction that transfers money between two accounts, ensuring both debit and credit operations succeed or fail together.

Expected output: A transaction that updates both accounts atomically.

Hint: Use BEGIN TRANSACTION, UPDATE statements, and COMMIT or ROLLBACK.

Simulate a Transaction Rollback

Write a transaction that inserts a record and then rolls back, verifying the record does not persist.

Expected output: No new record should exist after rollback.

Hint: Use ROLLBACK after the insert statement.

A SQL transaction groups multiple operations into a single unit that either fully succeeds or fails, ensuring data integrity and consistency.

The main transaction control commands are BEGIN (or START TRANSACTION), COMMIT, and ROLLBACK.

All changes made during the transaction are undone, and the database returns to its previous state before the transaction began.