How to fix the Oracle error ORA-40212: invalid target data type in input data for string function?

In this post, you’ll learn more about the Oracle ErrorORA-40212: invalid target data type in input data for string function with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-40212: invalid target data type in input data for string function

Reason for the Error ORA-40212: invalid target data type in input data for string function

Target data type was invalid.

How to fix the Error ORA-40212: invalid target data type in input data for string function ?

You can fix this error in Oracle by following the below steps

Classification function accepts CHAR,VARCHAR2, and NUMBER targets. Regression function accepts NUMBER targets only.