Suppose you have tblVehicleJobs with [VehicleJobID] keyfield.
And say there's another table used to keep records of inbound
letters you receive on each car. That table is named tblinLttrs
and has [InLttrID] as it's keyfield and has [VehicleJobID] field
which is used to link it to tblVehicleJobs.
Since many letters (of several categories) could be sent in over
time pertaining to a given vehicle, there is a hard-coded One To
Many relation****p from tblVehicleJobs to tblinLttrs respectively.
Supposing I have 5 distinct InLttr types: A, B, C, D and E and
that I wish to list all vehicles in a query that do NOT have a Type
C inbound letter record in tblinLttrs. How might I do that?
