How do I use transactions in SQL?

How do I use transactions in SQL?

In SQL, a transaction is a sequence of operations performed as a single logical unit of work. You can use commands like BEGIN, COMMIT, and ROLLBACK to manage transactions.

Can you give me an example of a transaction?

Sure! Here's a simple example:

BEGIN;
INSERT INTO accounts (user_id, balance) VALUES (1, 100);
UPDATE accounts SET balance = balance - 50 WHERE user_id = 2;
COMMIT;

This ensures that both operations succeed or fail together.

What happens if one of the operations fails?

If one operation fails, you can use ROLLBACK to undo all operations in the transaction, ensuring data integrity.

Are there any best practices for using transactions?

Yes! Always keep transactions short, avoid user interaction during a transaction, and handle exceptions properly to ensure data consistency.