get all -
 db.restaurants.find()

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

get by id -
db.restaurants.findOne({_id:ObjectId("59074c7c057aaffaafb10acb")})

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:ObjectId("59074c7c057aaffaafb0dbb7")})

update a single document -
 db.restaurants.updateOne({"_id" : ObjectId("59074c7c057aaffaafb0dbb1")},{$set: {name : "Bizz Bar Bang"}})

 update many -
 db.restaurants.updateMany({"address.zipcode":"10035"},{$set:{"address.zipcode":"10036"}})