The transaction support in JDBC 2 gave developers control over concurrent access to their data, thereby ensuring that persisted data is always in a consistent state.
JDBC 2中的事务支持让开发人员可以控制对数据的并发访问，从而保证持续数据总是保持一致的状态。
The state of each execution is persisted separately.
每一个执行的状态都是单独持久化的。
They run in a single transaction and their state is only hold in memory and not persisted to the process server database.
它们在单个事务中运行，其状态仅保存在内存中，而不能持久性地保存到流程的服务器数据库中。
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