20170411-oracle 查询指定节点下的所有子节点包括直到叶子节点

查询父节点

SELECT * FROM r_org org START WITH org.org_code = '6199840Q' CONNECT BY PRIOR PARENT_ID = ID; 

select * from r_org org where org.org_code = '61000089') connect by prior org.id = org.parent_id

select * from emp e start with e.empno=7839
connect by prior e.empno=e.mgr