I have a query that I run to populate a CFChart that I am trying to parametrize:
SELECT *
Your best bet it to parameterize every variable dropped into your query.
Include the cfsqltype as well as the value.
select *
from closed_tickets
where MONTH(closed_date) =
AND YEAR(closed_date) =
AND technician_id =
CF_SQL_VARCHAR might work and it might not, depending on how the date is actually stored (date type or var char).