详见原文博客链接http://www.killdb.com/2012/05/14/%e8%ae%b0%e4%b8%80%e6%ac%a1%e9%9d%9e%e5%bd%92%e6%a1%a3rac%e6%81%a2%e5%a4%8d%e5%a4%a7%e9%87%8f%e7%9a%84ora-600-%e9%94%99%e8%af%af.html
