create table dept(
 departno  varchar2(10),
   departname  varchar2(20),
 topno    varchar2(10));

insert into dept values('001','董事会','0');
insert into dept values('002','总裁办','001');
insert into dept values('003','财务部','001');
insert into dept values('004','市场部','002');
insert into dept values('005','公关部','002');
insert into dept values('006','销售部','002');
insert into dept values('007','分销处','006');
insert into dept values('008','业务拓展处','004');
insert into dept values('009','销售科','007');

create table tempdept
(
 tempdeptno    char(4), /*部门编号*/
 tempdeptname   varchar2(20), /*部门名称*/
  uppertempdeptno  char(4), /*上级部门编号*/
  uppertempdeptname  varchar2(20), /*上级部门名称*/
 tempdeptlevel   number(4) /*部门所处的级别*/
);

select departname
from dept
connect by prior departno=topno
start with topno='0';

select a.departname top ,b.departname next
from dept a,dept b
where a.departno=b.topno;

select lpad(departno,level*2+length(departno),'\')
from dept
start with topno='0'
connect by prior departno=topno;

select departno,departname,level '\' topno
from dept
start with topno='0'
connect by prior departno=topno;

select lpad(departno,level*2+length(departno),' ')
from dept
start with topno='0'
connect by prior departno=topno;

select lpad(departno,level*3,' ')