復制代碼 代碼如下:

-- ||是連接符，level可以看成常量
select t.fnum,LPAD(' ',3*level-3)||'|-'||fname fname,t.fparent,Level lev
From m_depart t
--start with后面是條件1
start with fparent is null
--connect by Prior后面是條件2
connect by Prior fnum=fparent