[{"role":"supervisor","name":"S1","branch":"School #A","id":1},{"role":"market","name":"M1","branch":"School #A","id":2},{"role":"market","name":"M2","branch":"School #A","id":3},{"role":"client","name":"C1","branch":"School #A","id":4},{"role":"client","name":"C2","branch":"School #A","id":5}]

db.collection.find({$or:[{role:{$ne:"market"}},{id:2}]})