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ORA-48421: Predicate string in the command must be single or double quoted ORACLE 报错故障修复远程处理

2023-11-05 08:49

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文档解释

ORA-48421: Predicate string in the command must be single or double quoted

Cause: The predicate string is not single or double quoted

Action: Put single or double quotes around the predicate string

ORA-48421是Oracle数据库的一个错误代码，指的是无法正确处理SQL语句中的谓词表达式。谓词表达式是一种查询语句中的字符串，必须要用单引号或双引号括起来以便引擎能够正确地把它识别出来。

官方解释

ORA-48421表示Oracle数据库检测到句子中的谓词表达式未正确括弧。可能原因是在SQL语句中忘了使用双引号或单引号将谓词字符串括起来。

常见案例

例如，在下列SQL语句中，谓词Hello World是使用单引号括起来的字符串，错误码会出现在下面：

SELECT * FROM Table WHERE Hello World;

一般处理方法及步骤

用户可以采用以下步骤修正该错误：

1. 检查SQL语句中的谓词，查看它们是否已用单引号或双引号括起来。

2. 如果没有，那么请用括号将谓词括起来。

3. 重新运行SQL语句，查看是否能够解决该问题。

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