Question

我得到一个ORA-01790：表达式必须与相应的表达式错误消息具有相同的数据类型。下面是我正在使用的sql。 CASE声明是否导致此问题？我是sql的新手，这是我第一次尝试使用UNION语句。我尝试过连接而不是UNION，但我尝试过的任何连接都会导致prior_amt字段为空。谢谢你的帮助........

SELECT 
    pa.BUSINESS_UNIT as BUS_UNIT, 
    pa.DESCR AS DESCRIPT,
    pdr.DEPTID AS DEPTID, 
    pdr.ASSET_ID AS ASSET_NO, 
    pdr.ACCOUNT_AD AS ACCT_AD, 
    pdr.BOOK AS BOOK,

    MAX(CASE WHEN (pdr.FISCAL_YEAR =2014 AND pdr.ACCOUNTING_PERIOD =11) THEN  pdr.DEPR END) as CURRENT_AMT,
    MAX(CASE WHEN (pdr.FISCAL_YEAR =2104 AND pdr.ACCOUNTING_PERIOD =10) THEN pdr.DEPR  END) as PRIOR_AMT,

    '' AS ACCT_DE,
    '' AS JRNL_ID,
    '' AS JRNL_DT

    FROM PS_ASSET pa

    INNER JOIN PS_DEPR_RPT pdr 
    ON pa.ASSET_ID = pdr.ASSET_ID
    AND pa.BUSINESS_UNIT = pdr.BUSINESS_UNIT

    WHERE 
    pa.BUSINESS_UNIT='A0465'
    AND pdr.BOOK='PERFORM'
    AND ((pdr.FISCAL_YEAR=2014 AND pdr.ACCOUNTING_PERIOD=11) 
    OR (pdr.FISCAL_YEAR=2014 AND pdr.ACCOUNTING_PERIOD=10))

    group by
    pa.business_unit,
    pa.descr,
    pdr.deptid,
    pdr.asset_id,
    pdr.account_ad,
    pdr.book

UNION ALL

    select
    '' as BUS_UNT,
    '' AS DESCRIPT,
    '' AS DEPTID, 
    '' AS ACCT_AD, 
    '' AS BOOK,
    '' AS CURRENT_AMT,
    '' AS PRIOR_AMT,
    pdl.asset_id AS ASSET_NO,
    pdl.account AS ACCT_DE,
    pdl.journal_id AS JRNL_ID,
    pdl.journal_date AS JRNL_DT

    from ps_dist_ln pdl

    where
    book = 'PERFORM'
    and business_unit = 'A0465'
    and fiscal_year = 2014
    and accounting_period = 11
    and distribution_type = 'DE'

Answer 1

您的问题是您在联盟的每一半中都以不同的顺序放置了列。列必须以相同的顺序在两半之间匹配。它与CASE表达无关。

此外，在您撰写2104的地方，可能应该是2014年。

Answer 2

我遇到了这种错误的奇怪情况：

我在特定行收到了 ORA-01790: expression must have same datatype as corresponding expression 错误消息。

示例：

INSERT  INTO TABLE_TO_INSERT (
                     COL_FIELD_1
                    ,COL_FIELD_2
                    ,COL_FIELD_3
                    ,COL_FIELD_4
                    ,COL_FIELD_5
                    ,COL_FIELD_6
                    )
SELECT  1
       ,2
       ,'IMPORT'
       ,'EXPORT'
       ,COL_DEXPIRATION ---- > SQL Developer shows ORA-01790 at this error line.
       ,COL_DEXPIRATION
FROM SOURCE_TABLE_1
UNION 
SELECT  1
       ,2
       ,'LOADING'
       ,'SAVING'
       ,COL_DCONFIRMDATE 
       ,COL_DATTACHMENTDATE
FROM SOURCE_TABLE_2;

就我而言，错误出现在带有 SELECT 的 UNION 语句中；但是，当我进一步检查错误的根源时，错误确实是由 SELECT 语句中使用的列的数据类型之间的不匹配造成的，而不是在 SQL Developer 中显示的红色突出显示的行中，而是在下一个SELECT语句中。

我进行了更改并成功编译了存储过程。

示例：

INSERT  INTO TABLE_TO_INSERT (
                     COL_FIELD_1
                    ,COL_FIELD_2
                    ,COL_FIELD_3
                    ,COL_FIELD_4
                    ,COL_FIELD_5
                    ,COL_FIELD_6
                    )
SELECT  1
       ,2
       ,'IMPORT'
       ,'EXPORT'
       ,COL_DEXPIRATION 
       ,COL_DEXPIRATION
FROM SOURCE_TABLE_1
UNION 
SELECT  1
       ,2
       ,'LOADING'
       ,'SAVING'
       ,CAST(COL_DCONFIRMDATE AS VARCHAR2 (500)) -- > The real ORA-01790 was at this line and this was the change made.
       ,CAST(COL_DATTACHMENTDATE VARCHAR2 (500)) -- > The real ORA-01790 was at this line and this was the change made.
FROM SOURCE_TABLE_2;

TL;DR：Oracle 很奇怪，请检查突出显示行之外的错误，并尽可能保持您的代码整洁有序。

导致ORA-01790的情况：表达式必须与相应的表达式错误具有相同的数据类型

2 个答案: