初始的树形数据状态：
|–2(0)–4(100)
0–1(0)–|

|–3(0)–5(200)

汇总后的树形数据状态：
|–2(100)–4(100)
0–1(300)–|
|–3(200)–5(200)

create table t
(
id number,
parent_id number,
value number
);
insert into t values(1,0);
insert into t values(2,1,0);
insert into t values(3,0);
insert into t values(4,2,100);
insert into t values(5,3,200);
commit;

SQL> select * from t order by id asc;
ID PARENT_ID VALUE
—- ———- ———-
1 0 0
2 1 0
3 1 0
4 2 100

5 3 200

SQL> with ttt as (select t.*,SYS_CONNECT_BY_PATH(id,’/’)||’/’ path from t start with t.parent_id=0 connect by prior t.id= t.parent_id) SELECT id,parent_id,value,(SELECT SUM(value) FROM ttt WHERE path like t1.path || ‘%’) s_value FROM ttt T1; ID PARENT_ID VALUE S_VALUE —- ———- ———- ———- 1 0 0 300 2 1 0 100 4 2 100 100 3 1 0 200 5 3 200 200