| inputlookup firstlookup | join type=left identity [| inputlookup secondlookup ] This will accomplish what you are trying to do. If secondlookup doesn't have a priority then the priority from firstlookup will be present.  If you want to ignore the initial priorty complete in firstlookup just do:  | inputlookup firstlookup | fields - priority | join type=left identity [| inputlookup secondlookup ]   ... View more