Working off 3 junction tables...

Question

Greetings:
My 3 dimensional skills are taxed with this query.
I have 3 junction M2M tables-
Bid to Code:
junction_ID bid_ID cccode_ID
Vendor to Code:
ccjunction_ID cccategory_ID vendor_ID
Vendor to bid (not used in this query)
and one contact table, which contains vendor_new_ID (FK) and
the email address I need to send a notification to.
new_contact_ID vendor_new_ID contact_email
I need to send out a notification email to all vendor
contacts who have the corresponding code.
I came up with:
<cfquery name="list_sentto"
datasource="#Request.BaseDSN#">
SELECT new_contact_ID, vendor_new_ID, contact_email, bid_ID,
cccode_ID, cccategory_ID, vendor_ID
FROM lookup_contact, junction_bid_ccc, junction_vendor_ccc
WHERE cccode_ID = cccategory_ID
AND vendor_new_ID = vendor_ID
AND ? (getting Cartesian product)
</cfquery>
which then does:
<cfmail
to="contact_email"
from="systememail"
subject="Bid Notification"
server ="ourserver">
= = = = = = = = = = = = = = = = = = = = = = = = = = =
You are receiving this message because you are listed as a
Vendor in our System.
The following Bid Package has been posted:
#link to PDF Document#
Please Log-In to the Vendor Bidding Notification System to
Access this Bid Package
= = = = = = = = = = = = = = = = = = = = = = = = = = =
</cfmail>
Thanks for any help-
rinorman

Answer 1

If you have any control at all over your database design,
re-do your many to many tables and get rid of the junctionid
fields. They enable you to have records that are effectively
duplicates of each other.
For your current design, you need to do a "select distinct"
to handle that part.
For your specific question, does the contact_new_id refer to
anything in either of the other tables you mentioned?