Updating table with query of 2 other tables?

Question

Greetings
I apologize in advance if this seems too easy to do- but I am missing something.
I have 8000 records in an Access DB (I know- it's going into SQL soon) in which all  the departmental office IDs need to be updated.
The column in the main table  is named "q_office_ID".
The user table includes  user_ID &  office_ID.
The office table also includes office_ID.
This UPDATE sets all the values to the number 10?:
<cfquery name="update" datasource="#Request.BaseDSN#">
SELECT     queue_ID, q_user_ID, user_ID, office_ID
FROM     main_helpdesk, lookup_user
WHERE  q_user_ID = user_ID
</cfquery>
<cfloop query="update"><cfquery name="updatedata" datasource="#Request.BaseDSN#">
UPDATE main_helpdesk
SET q_office_ID = #office_ID#
</cfquery></cfloop>
I know there is something obviously wrong with the update- any help would be greatly appreciated.
Thank You

Answer 1

Actually, it was:
<cfquery name="update" datasource="#Request.BaseDSN#">
SELECT queue_ID, q_user_ID, user_ID, office_ID
FROM main_helpdesk, lookup_user
</cfquery>
<cfloop query="update">
<cfquery name="updatedata" datasource="#Request.BaseDSN#">
UPDATE main_helpdesk
SET q_office_ID = #office_ID#
WHERE q_user_ID = #user_ID#
</cfquery></cfloop>
My mistake.