oracle中的 connect by prior用法
https://www.pianshen.com/article/71531660615/
https://www.cnblogs.com/Smileing/p/12171338.html
connect by prior
https://blog.csdn.net/huguangshanse00/article/details/109377655
标签：www,用法,prior,connect,https,oracle From： https://www.cnblogs.com/rapper-start/p/17110111.html