Mongo DB

//Get all
db.restaurants.find()

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

//Get by _id
db.restaurants.
  find({"_id": ObjectId("599399ad535efc3e9694cf4a")})

//Get by Value
db.restaurants.find({cuisine: "Irish"});

//Count
db.restaurants.count()

//Count by nester value
db.restaurants.find({'grades.grades': 'A'}).count()

//Delete by ID
db.restaurants.remove({_id: ObjectId("599399ad535efc3e9694cf4a")});

//Update single document
db.restaurants.updateOne(
  {_id: ObjectId("599399ad535efc3e9694cf4a")},
  {$set: {name: 'Bizz Bar Bang'}});

//Update many documents
db.restaurants.updateMany(
  {'borough': 'Manhattan'},
  {$set: {'borough': 'Brooklyn'}});