本文的第二个工作是用户操作日志的设计与实现。
The second job of this paper is design and implement of users operation logs.
用户操作日志包括用户管理日志、黑车日志、登录注销日志的后台自动产生功能的设计与实现，以及用户对日志信息的查询、备份、导出等功能的设计与实现。
This part not only implements function of user management logs, black car logs, login and logout logs to automatically produce, but also logs query, logs backup, logs export etc for users.
探测器在操作系统内核级上监视所有数据库事务，包括特权用户的事务，而不依赖于数据库审计日志。
The probes monitor all database transactions, including those of privileged users, at the operating system kernel level without relying on database audit logs.
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