[{name:"Ross",zipcode:"12345"},{name:"joey",zipcode:"12345"},{name:"chandler",zipcode:"22457"},{name:"monica",zipcode:"22457"},{name:"phoebe",zipcode:"32457"},{name:"rachel",zipcode:"32457"}]

db.collection.aggregate([{$lookup:{from:"collection",localField:"zipcode",foreignField:"zipcode",as:"zipcodes"}},{$match:{$or:[{name:"Ross"},{"zipcodes.name":"Ross"},]}},{$unset:"zipcodes"}])