Call now: 252-767-6166  
Oracle Training Oracle Support Development Oracle Apps

 E-mail Us
 Oracle Articles
New Oracle Articles

 Oracle Training
 Oracle Tips

 Oracle Forum
 Class Catalog

 Remote DBA
 Oracle Tuning
 Emergency 911
 RAC Support
 Apps Support
 Oracle Support

 SQL Tuning

 Oracle UNIX
 Oracle Linux
 Remote s
 Remote plans
 Application Server

 Oracle Forms
 Oracle Portal
 App Upgrades
 SQL Server
 Oracle Concepts
 Software Support

 Remote S


 Consulting Staff
 Consulting Prices
 Help Wanted!


 Oracle Posters
 Oracle Books

 Oracle Scripts

Don Burleson Blog 







VPD还有其他几个名称,包括行级安全性(Row-level security,RLS)和高精度访问控制(Fine-grained access control,FGAC)。不管采用什么名称,VPD都提供了访问Oracle数据的一种全新方式。


  • Oracle调用策略函数,它返回一个谓词(predicate)。谓词是一个WHERE子句,它对表中的一个特定的行集合进行限定。
  • Oracle动态重写查询,方法是将谓词追加到用户的SQL语句之后。





SELECT * FROM scott.emp WHERE P1


  • 动态安全性不需要维护复杂的角色和授予
  • 多种安全性为每个对象设置多个策略,并将它们堆叠在其他基本策略之上
  • Web应用程序由于是单个用户访问数据库,所以行级安全性很容易在不同的用户之间加以区分
  • 没有后门用户不能绕过嵌入应用程序的安全策略,因为安全策略已经附加到数据上



本文为ZDNet China版权所有,未经许可严禁转载。



Oracle Training at Sea
oracle dba poster

Follow us on Twitter 
Oracle performance tuning software 
Oracle Linux poster


Burleson is the American Team

Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

Verify experience! Anyone considering using the services of an Oracle support expert should independently investigate their credentials and experience, and not rely on advertisements and self-proclaimed expertise. All legitimate Oracle experts publish their Oracle qualifications.

Errata?  Oracle technology is changing and we strive to update our BC Oracle support information.  If you find an error or have a suggestion for improving our content, we would appreciate your feedback.  Just  e-mail:  

and include the URL for the page.


Burleson Consulting

The Oracle of Database Support

Oracle Performance Tuning

Remote DBA Services


Copyright © 1996 -  2020

All rights reserved by Burleson

Oracle ® is the registered trademark of Oracle Corporation.