Mongo Basic Drills

// get all

db.restaurants.find();

// limit and sort

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

// get by _id

var myId = db.restaurants.findOne({}, {_id: true})._id;
db.restaurants.findOne({_id: myId});

// get by value

db.restaurants.find({borough: "Queens"});

// count

db.restaurants.count();

// count by nest value

db.restaurants.find({'address.zipcode': '11206'}).count()

//delete by id

var myId = db.restaurants.findOne({}, {_id: true})._id;
db.restaurants.removeOne({_id: myId});

//update a single document

var myId = db.restaurants.findOne({}, {_id: true})._id;
db.restaurants.updateOne(
  {_id: myId},
  {$set: {name: 'Bizz Bar Bang'}});

// update many documents

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