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事务的四大特性(ACID特性):
A:原子性(Atomicity) 事务是数据库的逻辑工作单位,事务中包括的诸操作要么全做,要么全不做。B:一致性(Consistency) 事务执行的结果必须是使数据库从一个一致性状态变到另一个一致性状态。一致性与原子性是密切相关的。C:隔离性(Isolation) 一个事务的执行不能被其他事务干扰。D:持续性/永久性(Durability) 一个事务一旦提交,它对数据库中数据的改变就应该是永久性的。
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