///find all restaurants:
db.restaurants.find()

///limit and sort:
> db.restaurants.
... find().
... sort({name:1}).
... limit(10)


///find one by Id:
db.restaurants.findOne({'_id':ObjectId('58aba0098831b826f6b9eb3a')});


///find all from the borough of queens:
db.restaurants.find({'borough': 'Queens'})

//count of documents:
db.restaurants.count()

//count by nested value:
db.restaurants.count({'address.zipcode': '11206'})
db.restaurants.find({'address.zipcode': '11206'}).count()

///delete by ID:
db.restaurants.remove({'_id': ObjectId('58aba0088831b826f6b9a30e')})

///Update a single document:
 db.restaurants.updateOne(
... {'_id': ObjectId('58aba0088831b826f6b99fb5')},
... {$set: {'name':'Bizz Bar Bang'}});

//update many zip codes:
db.restuarants.updateMany(
... {'address.zipcode':10035},
... {$set{'address.zipcode':10036}}
... );