Question

我有2个表（USERS和ACCOUNTS），其中包含以下数据：

用户

UserID     Name          Account_Number
10         John Smith    13
20         Alex Brown    14
30         Mary Wade     34

帐户

Account number     Amount     
13                 40
34                 30
14                 30
13                 60
14                 10

我想知道如何编写查询以返回以下结果：

UserID             Name           Total amount     
13                 John Smith     100     
14                 Alex Brown     40             
34                 Mary Wade      30

我尝试的查询是：

SELECT USER_ID, NAME, (SELECT SUM(AMOUNT) FROM ACCOUNTS GROUP BY ACCOUNT) AS TOTAL_AMOUNT
FROM USERS
JOIN ACCOUNTS
USING(ACCOUNT_NUMBER)
ORDER BY TOTAL_AMOUNT DESC;

当我执行此操作时，我收到以下错误：ORA-01427：单行子查询返回多行。

是否有人知道我如何修改查询以使其按预期工作？

谢谢！

Answer 1

删除子查询..它返回多行..

SELECT U.USERID, U.NAME, SUM(A.AMOUNT) AS TOTAL_AMOUNT
FROM USERS U
 INNER JOIN ACCOUNT A on U.ACCOUNT_NUMBER=A.ACCOUNT_NUMBER
GROUP BY A.ACCOUNT_NUMBER,U.USERID, U.NAME
ORDER BY SUM(A.AMOUNT) DESC;

Fiddle

Answer 2

也许是这样的：

SELECT
    USERS.USER_ID,
    USERS.NAME,
    SUM(ACCOUNTS.Amount) AS TotalAmout
FROM USERS
JOIN ACCOUNTS
    ON ACCOUNTS.Account_number=USERS.Account_number
GROUP BY
    USERS.USER_ID,
    USERS.NAME
ORDER BY
    TotalAmout DESC

Answer 3

请尝试：

select 
    Account_Number, 
    Name,
    (select SUM(Amount) from ACOUNTS b where b.[Account number]=a.Account_Number) Total
from USERS a
order by Account_Number

ORA-01427：单行子查询返回多个行错误

3 个答案: