Question

SELECT * FROM DIM_TRANS_TYPE WHERE TRANSACTION_TYPE='ILAU';

我想在这里完成的是在上述记录中将ILAU更改为IFAU和Instant Loan Authorization Request更改为Instant Finance Authorization Request。

表架构：

Name                  Null     Type               
--------------------- -------- ------------------ 
TRANSACTION_TYPE      NOT NULL VARCHAR2(4 CHAR)   --> PRIMARY KEY
TRANSACTION_TYPE_DESC          VARCHAR2(256 CHAR)

工作!!!

MERGE INTO DIM_TRANS_TYPE a
USING (SELECT 'ILAU' TRANSACTION_TYPE, 'Instant Loan Authorization Request' TRANSACTION_TYPE_DESC FROM DUAL) b
    ON (a.TRANSACTION_TYPE = b.TRANSACTION_TYPE)
WHEN MATCHED THEN UPDATE
    SET
      a.TRANSACTION_TYPE_DESC = 'Instant Finance Authorization Request'
WHEN NOT MATCHED THEN
    INSERT(a.TRANSACTION_TYPE, a.TRANSACTION_TYPE_DESC)
    VALUES(b.TRANSACTION_TYPE, b.TRANSACTION_TYPE_DESC);

不工作!!! （如下所示）

MERGE INTO DIM_TRANS_TYPE a
USING (SELECT 'ILAU' TRANSACTION_TYPE, 'Instant Loan Authorization Request' TRANSACTION_TYPE_DESC FROM DUAL) b
    ON (a.TRANSACTION_TYPE = b.TRANSACTION_TYPE)
WHEN MATCHED THEN UPDATE
    SET
      a.TRANSACTION_TYPE = 'IFAU',
      a.TRANSACTION_TYPE_DESC = 'Instant Finance Authorization Request'
WHEN NOT MATCHED THEN
    INSERT(a.TRANSACTION_TYPE, a.TRANSACTION_TYPE_DESC)
    VALUES(b.TRANSACTION_TYPE, b.TRANSACTION_TYPE_DESC);

错误：

Error at Command Line : 5 Column : 9
Error report -
SQL Error: ORA-38104: Columns referenced in the ON Clause cannot be updated: "A"."TRANSACTION_TYPE"
38104. 00000 -  "Columns referenced in the ON Clause cannot be updated: %s"
*Cause:    LHS of UPDATE SET contains the columns referenced in the ON Clause
*Action:

Answer 1

如错误消息所示，无法更新on子句中使用的字段。

您必须在单独的声明中进行此类更新。像这样：

UPDATE DIM_TRANS_TYPE
SET    TRANSACTION_TYPE = 'IFAU',
       TRANSACTION_TYPE_DESC = 'Instant Finance Authorization Request'
WHERE  TRANSACTION_TYPE IN (
            SELECT TRANSATION_TYPE
            FROM   (SELECT 'ILAU' TRANSACTION_TYPE, 
                           'Instant Loan Authorization Request' TRANSACTION_TYPE_DESC 
                    FROM DUAL)
       );

MERGE INTO DIM_TRANS_TYPE a
USING      (SELECT 'ILAU' TRANSACTION_TYPE, 
                   'Instant Loan Authorization Request' TRANSACTION_TYPE_DESC 
            FROM   DUAL) b
        ON (a.TRANSACTION_TYPE = b.TRANSACTION_TYPE)
WHEN NOT MATCHED THEN
    INSERT(TRANSACTION_TYPE, TRANSACTION_TYPE_DESC)
    VALUES(b.TRANSACTION_TYPE, b.TRANSACTION_TYPE_DESC);

您可能希望在事务中执行此操作，以便提交这两个语句中的两个或两个都不会发生更改。

当然，IN子句看起来有点夸张，因为值可以简单地与ILAU进行比较，但我假设你简化了问题，实际上你有一个更大的数据集来获取{ {1}}来自。

的值

Answer 2

也许我错过了一些东西......看来你正在寻找所有transaction_type = 'ILAU'（无论}的）的行，以及那些行将transaction_type_desc更新为transaction_type，将'IFAU'更新为transaction_type_desc。正确？

如果是这样，为什么除了简单的'Instant Finance Authorization Request'声明之外还需要其他任何内容？

UPDATE

在您的尝试中还有一个update dim_trans_type set transaction_type = 'IFAU', transaction_type_desc = 'Instant Finance Authorization Request' where transaction_type = 'ILAU' ;子句 - 如果现有行都没有when not matched，则插入一行。这与您的要求有何关系？你说我想在这里完成的只是改变[.....] - 没有提到插入任何东西。问题陈述，用简单的英语，是不完整的？或者你是否插入了不需要插入的东西？

无法使用merge语句合并Oracle数据库中的记录

2 个答案: