Transaction processing is a technique that ensures that a series of steps fail or succeed together. Such steps are said to be a transaction. It is common for business software, programming languages and databases to support transactions. Transaction processing typically involves making tentative updates that are only committed when the transaction is fully complete. In this way partial successes or partial failures are prevented.
A collection of steps that are treated as a single atomic unit that succeed or fail together.
An order management system binds three steps into one transaction: taking an order, checking inventory and billing. If the inventory check fails the order will not be accepted and billing will not occur. The transaction guarantees that the customer will not be charged for something that's not in inventory. It also guarantees that the inventory system will not be updated if billing fails and a payment does not occur.
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