找到员工的经理并创建专栏

Question

我的输入表是这样的

员工	经理
拉胡尔	咏叹调
咏叹调	普里亚
普里亚	席拉
vasant	瑞玛
瑞玛	颂歌
古哈	reeye

这就是我想要的输出

员工	经理1	经理2	经理 3
拉胡尔	咏叹调	普里亚	席拉
vasant	瑞玛	颂歌
古哈	reeya

我怎样才能做到这一点？我试过直到我能成为唯一的经理，但不确定如何随着经理与员工关系的继续建立专栏

Answer 1

您可以使用 SQL 层次结构查询来检索：

    with tabletest as 
(
select 
'rahul' employee , 'aria' as manager from dual
union 
select 
'aria' as employee, 'priya' as manager from dual
union 
select
'priya' as employee, 'sheela' as manager from dual
)

select level, a.employee, Sys_Connect_By_Path(a.manager,'/') as path from tabletest a
connect by prior a.employee = a.manager;