What is a database transaction?
2022/7/13 23:20:11
本文主要是介绍What is a database transaction?,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
A transaction is a way of representing a state change. Transactions ideally have four properties, commonly known as ACID:- Atomic (if the change is committed, it happens in one fell swoop; you can never see "half a change")
- Consistent (the change can only happen if the new state of the system will be valid; any attempt to commit an invalid change will fail, leaving the system in its previous valid state)
- Isolated (no-one else sees any part of the transaction until it's committed)
- Durable (once the change has happened - if the system says the transaction has been committed, the client doesn't need to worry about "flushing" the system to make the change "stick")
See the Wikipedia ACID entry for more details.
Although this is typically applied to databases, it doesn't have to be. (In particular, see Software Transactional Memory.)
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