Question

我有两张有亲子关系的表

Table1
| Account_no | Main_account_no | bla bla
+------------+-----------------+----------
|     234    |        111      |  
|     235    |        111      |  
|     222    |        112      |  
|     220    |        112      |

第二个：

Table2
| Account_no | Balance         | bla bla
+------------+-----------------+----------
|     234    |        10       |  
|     235    |        15       |  
|     222    |        55       |  
|     220    |        45       |

我需要的是计算每个父帐户的子帐户余额总和。预期的结果是

| Main_account_no | Balance |
+-----------------+---------+
| 111             |  35     |
| 112             |  100    |

我正在尝试使用

SELECT MAIN_ACCOUNT_NO, SUM((SELECT BALANCE FROM TABLE2 WHERE ACCOUNT_NO = A.ACCOUNT_NO)) OVER (PARTITION BY MAIN_ACCOUNT_NO)
FROM TABLE1 A
GROUP BY MAIN_ACCOUNT_NO

但我得到了ORA-00979: not a GROUP BY expression

我哪里做错了？

Answer 1

因为这显然不是家庭作业......： - ）

首先让我们获取main_account_nos以及余额：

select
    Table1.Main_account_no,
    Table1.Account_no,
    Table2.Balance
from
    Table1
    join Table2 on Table1.Account_no = Table2.Account_no

给出

| Main_account_no | Account_no | Balance         |
+-----------------+------------+-----------------+
|        111      |     234    |        10       |
|        111      |     235    |        15       |
|        112      |     222    |        55       |
|        112      |     220    |        45       |

现在我们可以根据需要轻松分组：

select
    Table1.Main_account_no,
    sum(Table2.Balance) as total
from
    Table1
    join Table2 on Table1.Account_no = Table2.Account_no
group by
    Table1.Main_account_no

计算每个父母的子女余额总和

1 个答案: