--取所有的上级和下级代码
--取所有的上级代码
select * from dm_qx_gns t start with t.gn_dm='12334' connect by prior t.sjgn_dm=t.gn_dm
--取所有的下级代码
select * from dm_qx_gns t start with t.gn_dm='12334' connect by prior t.gn_dm=t.sjgn_dm
--取所有的上级代码
select * from dm_qx_gns t start with t.gn_dm='12334' connect by prior t.sjgn_dm=t.gn_dm
--取所有的下级代码
select * from dm_qx_gns t start with t.gn_dm='12334' connect by prior t.gn_dm=t.sjgn_dm