Get all           db.restaurants.find({});
limit & sort      db.restaurants.find().sort({name: 1}).limit(10);
get by_id         var objectId = db.restaurants.findOne({}, {_id: true})._id;
                  db.restaurants.findOne({_id: objectId});
get by value      db.restaurants.find({borough: "Queens"});
count             db.restaurants.count();
count by
nested value      db.restaurants.find({"address.zipcode": "11206"}).count();
delete by id      var objectId = db.restaurants.findOne({}, {_id: true})._id;
                  db.restaurants.removeOne({_id: objectId});
update 1 doc      var objectId = db.restaurants.findOne({}, {_id: true})._id;
                  db.restaurants.updateOne({_id: objectId}, {$set: {name: "Bizz Bar Bang"}});
update many       db.restaurants.updateMany({"address.zipcode": "10035"}, {$set: {"address.zipcode": "10036"}});