Not sure how this would work out but you could try adding both of your tables to the query and then have a column (in addition to your Offer column): Exp: IIf(InStr([Offer],[Tarrifs]),True,False) with the criteria set to True. It might work. You'll need to set the query to distinct. That's the only way I can think of doing it in a query verses doing it with vba code. Only problem is you might get some records which match in the instr function which you don't want in the query but it may be worth a shot.