dbms_space 评估存储空间

http://blog.sina.com.cn/s/blog_591d55ec0100ci7s.html

http://blog.youkuaiyun.com/youbo2004/archive/2004/09/17/107839.aspx

http://blog.youkuaiyun.com/waferleo/archive/2009/04/25/4105423.aspx

hash-aj anti join , the very beautiful article site:

http://structureddata.org/2008/05/22/null-aware-anti-join/

sql 优化ppt

http://wenku.baidu.com/view/a98e32f5f61fb7360b4c654c.html

oracle blog article:

http://space.itpub.net/batch.viewlink.php?itemid=17162-

http://blog.sina.com.cn/alldb

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