How to fix the Oracle error PLS-00620: type mismatch found at ‘string’ among operands in a COALESCE expression?

In this post, you’ll learn more about the Oracle ErrorPLS-00620: type mismatch found at ‘string’ among operands in a COALESCE expression with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00620: type mismatch found at ‘string’ among operands in a COALESCE expression

Reason for the Error PLS-00620: type mismatch found at ‘string’ among operands in a COALESCE expression

In a COALESCE expression, the operands do not match in datatype, and it is unclear which implicit conversion is required to correct the mismatch.

How to fix the Error PLS-00620: type mismatch found at ‘string’ among operands in a COALESCE expression ?

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

Change the operands so that their datatypes match. Consider using datatype conversion functions in the operands.