oracle遍历查询，列转行

--列合并
--wm_concat(列名),该函数能够把列值以","号分隔起来,并显示成一行
--dbms_lob.substr 将clob转字符串
-- start with.....connect by ..=prior.. 遍历查询全部子节点的父节点
select dbms_lob.substr(wm_concat(name)) as name
  from (select name
          from table  where type='abc'
         start with id= '6208bcb7:164c70cf84d:-7fce'
        connect by id= prior pid
         order by levelno)