SQL Transactions Examples

Create a Transaction with Savepoint

Write a SQL transaction that updates two tables. Use a savepoint after the first update and rollback to it if the second update fails.

Expected output: A transaction that partially rolls back on failure and commits successful changes.

Hint: Use BEGIN TRANSACTION, SAVEPOINT, ROLLBACK TO, and COMMIT commands.

Simulate a Failed Transaction

Write a transaction that attempts to insert data into a table but rolls back if a constraint violation occurs.

Expected output: No changes are saved if the insert fails.

Hint: Use error handling with ROLLBACK.

A SQL transaction ensures that a group of database operations execute as a single unit, maintaining data integrity by either committing all changes or rolling back all if any operation fails.

COMMIT saves all changes made during the transaction permanently, while ROLLBACK undoes all changes made during the transaction.

SAVEPOINT is used to set intermediate points within a transaction to which you can rollback partially without aborting the entire transaction.