How to fix the Oracle error PLS-00618: type mismatch found at ‘string’ between operands in a NULLIF expression?

In this post, you’ll learn more about the Oracle ErrorPLS-00618: type mismatch found at ‘string’ between operands in a NULLIF expression with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

PLS-00618: type mismatch found at ‘string’ between operands in a NULLIF expression

Reason for the Error PLS-00618: type mismatch found at ‘string’ between operands in a NULLIF expression

In a NULLIF expression, the two 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-00618: type mismatch found at ‘string’ between operands in a NULLIF 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.