What is transaction processing?

Transaction processing involves the systematic handling of a sequence of operations or transactions within a database or system. It includes:

1. **Execution:** Performing operations such as data retrieval, modification, and storage as part of a transaction.

2. **Atomicity:** Ensuring that all operations within a transaction are completed successfully; if not, the transaction is rolled back to maintain consistency.

3. **Consistency:** Guaranteeing that a transaction transforms the database from one consistent state to another.

4. **Isolation:** Keeping transactions independent so that concurrent transactions do not interfere with each other.

5. **Durability:** Ensuring that once a transaction is committed, its results are permanently recorded in the system, even in the case of failures.

Transaction processing is crucial for maintaining data integrity, reliability, and accuracy in systems handling multiple simultaneous operations, such as banking, e-commerce, and enterprise applications.