ORA-01858: a non-numeric character was found where a numeric was expected ORACLE 报错 故障修复 远程处理

文档解释

ORA-01858: a non-numeric character was found where a numeric was expected

Cause: The input data to be converted using a date format model was incorrect. The input data did not contain a number where a number was required by the format model.

Action: Fix the input data or the date format model to make sure the elements match in number and type. Then retry the operation.

ORA-01858错误表示在要求数字的地方出现非数字。官方解释是，该错误表示引发了一个由ODBC报告的ORA-01858（a non-numeric character was found where a numeric was expected）错误。

该错误的常见案例是，当在Oracle数据库中使用TO_CHAR函数转换一个数字值到字符串值时，会将非数字字符放到想要得到数字的地方。

正常处理该问题的步骤是：

第一步：检查TO_CHAR函数中的格式参数，以确保转换正确；

第二步：检查数据库中值为字符类型的列是否正确提供；

第三步：检查字符串，以查看是否有特殊字符；

第四步：使用TRIM函数去掉无关的多余字符；

第五步：检查语句中是否有非法字符。