I'm trying to pass a parameter to a WHERE clause in an Informix SQL statement. But I keep getting an error:

Example:

Select * from Clients
WHERE Client_ID = ?????

What does Informix expect in the "?????" area?

What is the error that you are getting? How are you going about this? Is it a stored procedure? A prepared statement? Something else?

A very basic answer to your question would be to suggest that Informix is looking for a variable that has been defined and assigned a value that would be valid for comparison with Client_ID. Without more details about the situation and the error that you are getting, I can't give a more specific answer.