Question

这是我尝试过的一切！

UPDATE DailyBooking
SET RecievedAmount =
(
    SELECT DailyBooking.ID, 
        (SELECT  SUM(RecipientDetails.Amount) FROM RecipientDetails
         WHERE RecipientDetails.DBID = DailyBooking.ID)
    FROM DailyBooking
    INNER JOIN RecipientDetails
        ON RecipientDetails.DBID = DailyBooking.ID 
 )

此查询引发错误

当选择列表中只能指定一个表达式时子查询不是用EXISTS引入的。

当我尝试使用where子句时：

 UPDATE DailyBooking SET RecievedAmount=(
    SELECT DailyBooking.ID, 
    (SELECT  SUM(RecipientDetails.Amount) FROM RecipientDetails
    WHERE RecipientDetails.DBID = DailyBooking.ID) FROM DailyBooking INNER JOIN RecipientDetails ON 
    RecipientDetails.DBID =DailyBooking.ID 
     ) where DailyBooking.ID = RecipientDetails.DBID

它会抛出错误：

消息4104，级别16，状态1，行6多部分标识符＆＃34; RecipientDetails.DBID＆＃34;无法受约束。

表格！ 1表提供总和： RecipientDetails

具有RecievedAmount列的表：

DailyBooking

先谢谢..

Answer 1

您不能让内部SQL返回超过1的值，因为它的结果是SET收到的结果。

试试这个（不适用于所有数据库，但你没有指定你使用的那个）：

UPDATE DailyBooking d
SET d.RecievedAmount =
(
   SELECT  SUM(RecipientDetails.Amount) FROM RecipientDetails            
   WHERE RecipientDetails.DBID = d.ID
)

Answer 2

一种选择是将您的聚合查询移动到CTE中，然后使用它加入更新：

WITH cte AS (
    SELECT DBID, SUM(Amount) AS RecievedAmount
    FROM RecipientDetails
    GROUP BY DBID
)
UPDATE db
SET RecievedAmount = t.RecievedAmount
FROM DailyBooking db
INNER JOIN cte t
    ON db.ID = t.DBID;

这应该比通过相关子查询更新来计算总和更好。

Answer 3

希望这有帮助。

UPDATE DailyBooking
SET RecievedAmount =
 (SELECT  SUM(RecipientDetails.Amount) FROM RecipientDetails
     WHERE RecipientDetails.DBID = DailyBooking.ID)
FROM DailyBooking
INNER JOIN RecipientDetails
    ON RecipientDetails.DBID = DailyBooking.ID

从表中获取总和并尝试更新另一行中的行

3 个答案: