Query Help

I'm interested in finding the minimim A.id such that the following holds:

select A.charge
, B.user_id
, C.employee_id
from A
inner join B using (user_id)
inner join C using (employee_id)

except

select X.charge
, Y.user_id
, Z.employee_id
from X
inner join Y using (user_id)
inner join Z using (employee_id)

--

I can't do the following, since the number of selected columns have to match:

select A.id
, A.charge
, B.user_id
, C.employee_id
from A
inner join B using (user_id)
inner join C using (employee_id)

except

select X.charge
, Y.user_id
, Z.employee_id
from X
inner join Y using (user_id)
inner join Z using (employee_id)

Can someone help me with the query?

Thanks in advance.

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