oracle 如何查看创建表等数据库对象时的DDL语句

http://missyou4417.blog.163.com/blog/static/78905686201271041340284/

http://www.xifenfei.com/2012/05/%e4%bd%bf%e7%94%a8dbms_metadata-get_ddl%e5%87%ba%e7%8e%b0ora-31605%e9%94%99%e8%af%af.html

https://blog.csdn.net/xtdhqdhq/article/details/18797235

https://blog.csdn.net/haiross/article/details/25605213