需要注意得是，任何消息都包含事务协调上下文，不管是应用程序间的消息还是应用程序发送给数据库的消息。
Be aware that the transaction coordination context is part of each message, even messages between applications and messages from applications to the database service.
同一数据库中模式间的SQL操作是事务性的。
SQL manipulation between schemas in the same database are transactional.
同一数据库中模式间的SQL操作是事务性的。
SQL manipulation between schemas in the same database are transactional.
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