databases implement acid transactions using a combination of techniques designed to ensure atomicity, consistency, isolation, and durability. here's how they achieve each component: techniques...
数据库通过多种技术实现acid事务，确保原子性、一致性、隔离性和持久性。原子性依赖事务日志和回滚机制；一致性通过约束和触发器维护；隔离性由锁和多版本并发控制（mvcc）保障；持久性依赖事务日志、检查点和备份。不同数据库如mysql、postgresql和oracle有各自的实现特点。
