[{"category":"jeans","price":6000},{"category":"jeans","price":400},{"category":"jeans","price":5000}]

db.collection.find({"category":"jeans","$or":[{"$and":[{"price":{"$gt":1000}},{"price":{"$lte":5000}}]},{"$and":[{"price":{"$gt":0}},{"price":{"$lte":500}}]}]})