ServerSide Unit2.1.3

get all: db.restaurants.find()

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

get by _id:
var docId = db.restaurants.findOne({})._id;
then db.restaurants.find({_id: docId})

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:
db.restaurants.remove({_id: id}, {justOne: true})

Update a single document:
var docId = db.restaurants.findOne({})._id;
db.restaurants.updateOne(
  {_id: docId},
  {$set: {name: 'Bizz Bar Bang'}});

Update many documents:

db.restaurants.updateMany(
  {'address.zipcode': '10035'},
  {$set: {'address.zipcode': '10036'}}
);