通過根節點遍歷子節點.
select level,a.deptproperty,a.* from sys_org a
start with a.parentid='0'
connect by prior a.org_objid=a.parentid
--通過子節點獲取頂節點
select first_value(org_objid) over
(order by level desc rows unbounded preceding)
as firstdeptid from sys_org start with org_objid='3617460111308021' connect by prior parentid=org_objid
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