Oracle中的字符集不匹配错误 [英] Character Set Mismatch Error in Oracle

问题描述

我有以下要运行的查询:

I have following query with me that I am trying to run:

SELECT Script from (

SELECT 9 as ColOrder, ' INSERT INTO PROJ VALUES(' || ID || ',''' || Name || ''', ''' || Version || ''', ''ABCD'', sysdate , ''ABCD'', sysdate);' as Script FROM PROJ where Name like '%[Param.1]%'

union

SELECT 11 as ColOrder,' INSERT INTO PROJMOD VALUES(' || ID || ', ' || ProjID || ', ' || ModID || ', ' || ObjID || ', ''ABCD'', sysdate, ''ABCD'', sysdate);' as Script FROM PROJMOD where ProjID in ( select ID from PROJ where Name like '%[Param.1]%')

) x

Order by ColOrder

但是它给了我ORA-12704: character set mismatch error.

当我分别运行两个select语句时，它给我适当的输出，但是当我同时执行两个select时，它给tme字符集不匹配错误.

When I run both the select statement individually, it gives me proper output but when I am doing union of both select, it gives tme character set mismatch error.

这有什么问题吗?

推荐答案

您已经确认某些内容是NVARchar的..将nvarchar转换为char例如

as you've confirmed some things are NVARchar'd ..cast the nvarchar to char eg

SQL> create table tab(a nvarchar2(2));

Table created.

SQL> insert into tab values ('a');

1 row created.

SQL> select 1, 'hi' from dual
  2  union all
  3  select 2, a from tab;
select 1, 'hi' from dual
          *
ERROR at line 1:
ORA-12704: character set mismatch

失败，因为"A"是NVARCHAR.所以to_char它:

fails as "A" is NVARCHAR. so to_char it:

SQL> select 1, 'hi' from dual
  2  union all
  3  select 2, to_char(a) from tab;

         1 'HI'
---------- ----
         1 hi
         2 a

或将字符串文字"hi"转换为Nvarchar

or cast the string literal 'hi' to a Nvarchar

   SQL> select 1, n'hi' from dual
      2  union all
      3  select 2, a from tab;

             1 N'
    ---------- --
             1 hi
             2 a

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