In this post, you’ll learn about the error message -409 invalid operand of a count function in the IBM DB2 database , the reason why it occurs along with the solution to fix it
IBM DB2 Error Message
-409 invalid operand of a count function
Reason for the Error
The operand of the COUNT function in the statement violates SQL syntax.� A common error is a column name or other expression without DISTINCT.
Correct the syntax and resubmit the statement.