What are some examples of database transactions?

What are some examples of database transactions?

Database transactions are sequences of operations performed as a single logical unit of work. Examples include: 1. Bank transfers: Moving money from one account to another. 2. Online order processing: Updating inventory and creating an order record. 3. Booking systems: Reserving a flight and charging the customer.

Can you explain the ACID properties of transactions?

Sure! ACID stands for Atomicity, Consistency, Isolation, and Durability. Atomicity ensures that all operations in a transaction are completed successfully or none at all. Consistency ensures that a transaction brings the database from one valid state to another. Isolation ensures that transactions do not interfere with each other. Durability guarantees that once a transaction is committed, it will remain so, even in the event of a system failure.

What happens if a transaction fails?

If a transaction fails, the database management system will roll back any changes made during that transaction, ensuring that the database remains in a consistent state.

Can you give me a real-world scenario of a transaction?

Certainly! Consider an online shopping scenario: when a customer places an order, the transaction includes checking inventory, charging the customer's credit card, and updating the stock levels. If any part of this process fails, the entire transaction is rolled back to prevent issues like overselling.