Sql 新手oracle更新语句错误

oracle查询：

UPDATE AIRMODEL_NETWORK_SUMMARY 
SET CASES_PRODUCED = (SELECT DISTINCT PRDCTN_RUN_ACTL_CASE_QTY
                       FROM AIRMODEL_NETWORK_SUMMARY, HISTORY_PRODUCTION, PERIOD_TO_PROCESS
                      WHERE AIRMODEL_NETWORK_SUMMARY.FSCL_WK_IN_YR_NUM = HISTORY_PRODUCTION.FSCL_WK_IN_YR_NUM 
                        AND AIRMODEL_NETWORK_SUMMARY.FSCL_YR_NUM = HISTORY_PRODUCTION.FSCL_YR_NUM 
                        AND AIRMODEL_NETWORK_SUMMARY.LOC_ID = HISTORY_PRODUCTION.LOC_ID 
                        AND HISTORY_PRODUCTION.FSCL_WK_IN_YR_NUM = PERIOD_TO_PROCESS.FSCL_WK_IN_YR_NUM 
                        AND HISTORY_PRODUCTION.FSCL_YR_NUM = PERIOD_TO_PROCESS.FSCL_YR_NUM);

正在返回以下错误：

ORA-01427:单行子查询返回多行

另一次纠正尝试：

 MERGE INTO AIRMODEL_NETWORK_SUMMARY AIRMODEL_NETWORK_SUMMARY1 
  USING (SELECT DISTINCT PRDCTN_RUN_ACTL_CASE_QTY, 
           AIRMODEL_NETWORK_SUMMARY2.rowid AS r 
      FROM AIRMODEL_NETWORK_SUMMARY AIRMODEL_NETWORK_SUMMARY2 
           INNER JOIN HISTORY_PRODUCTION 
              ON AIRMODEL_NETWORK_SUMMARY2.FSCL_WK_IN_YR_NUM = HISTORY_PRODUCTION.FSCL_WK_IN_YR_NUM 
                 AND AIRMODEL_NETWORK_SUMMARY2.FSCL_YR_NUM = HISTORY_PRODUCTION.FSCL_YR_NUM 
                 AND AIRMODEL_NETWORK_SUMMARY2.LOC_ID = HISTORY_PRODUCTION.LOC_ID 
           INNER JOIN PERIOD_TO_PROCESS 
              ON HISTORY_PRODUCTION.FSCL_WK_IN_YR_NUM = PERIOD_TO_PROCESS.FSCL_WK_IN_YR_NUM 
                 AND HISTORY_PRODUCTION.FSCL_YR_NUM = PERIOD_TO_PROCESS.FSCL_YR_NUM) 
   ON (AIRMODEL_NETWORK_SUMMARY1.rowid = r) 
 WHEN MATCHED THEN UPDATE 
  SET CASES_PRODUCED = PRDCTN_RUN_ACTL_CASE_QTY;

返回以下错误：

ORA-30926:无法在源表中获取一组稳定的行

我是个笨蛋，需要帮助：(

---

谢谢。

您只能为生成的案例指定单个标量值。因此，您的子查询只需要生成单个标量值

您需要找到子查询返回多行的原因

SELECT DISTINCT…

将选择唯一的行，与

一行不同

您需要行中所有PRDCTN\U RUN\U ACTL\U CASE\U数量的总和吗

还是平均水平

还是最大值

还是第一排

如果是，请使用聚合函数：

总数

马克斯

平均值

UPDATE AIRMODEL_NETWORK_SUMMARY 
    SET CASES_PRODUCED = (SELECT AVG(PRDCTN_RUN_ACTL_CASE_QTY) ...

第一排

UPDATE AIRMODEL_NETWORK_SUMMARY 
    SET CASES_PRODUCED = (SELECT PRDCTN_RUN_ACTL_CASE_QTY ... 
                          FROM ... 
                          WHERE ROWNUM = 1)

你必须清楚地理解，尤其是在学习和努力学习语法时

您需要从查询中获得什么
您的查询返回了什么
尝试一系列替代方案直到成功，这无疑是一种创建错误数据的有效方法

我的建议是首先将子查询
SELECT
复制到另一个窗口，然后运行它，查看并理解结果。应该清楚它是一个多行结果。使用子查询，直到它返回正确的单个结果，然后将其插回更大的更新中。
我正在尝试更新airmodel\u netw中的列当值满足条件时，使用“选择”中的值进行汇总。
UPDATE AIRMODEL_NETWORK_SUMMARY 
    SET CASES_PRODUCED = (SELECT AVG(PRDCTN_RUN_ACTL_CASE_QTY) ...

UPDATE AIRMODEL_NETWORK_SUMMARY 
    SET CASES_PRODUCED = (SELECT PRDCTN_RUN_ACTL_CASE_QTY ... 
                          FROM ... 
                          WHERE ROWNUM = 1)