Mongo Drills

//get all:
db.collection.find()

//Find the command that makes the first 10 restaurants appear when db.restaurants is alphabetically sorted by the name //property.
//Code translation: find items from restaurants collections that are ascending alphabetically (as indocated by the 1; //descending is -1); resturn a limit of 10 results
db.restaurants.
... find().
... sort({name: 1}).
... limit(10);

//Retrieve a single restaurant by _id from the restaurants collection. This means you'll first need to get the _id for one of //the restaurants imported into the database.
db.restaurants.findOne({})._id;
ObjectId("59074c7c057aaffaafb0da64")
> var documentId = ObjectId('59074c7c057aaffaafb0da64');
> db.restaurants.findOne({_id: documentId});

//Write a command that gets all restaurants from the borough of "Queens".
db.restaurants.find({borough: "Queens"});

//Write a command that gives the number of documents in db.restaurants.
db.restaurants.count()
>>3950

//Write a command that gives the number of restaurants whose zip code value is '11206'. Note that this property is at //document.address.zipcode, so you'll need to use dot notation to query on the nested zip code property.
db.restaurants.find({'address.zipcode': '11206'}).count()

//Write a command that deletes a document from db.restaurants. This means you'll first need to get the _id for one of the //restaurants imported into the database.
db.restaurants.findOne({})._id;
var documentId = ObjectId("59074c7c057aaffaafb0da64");
db.restaurants.remove({_id: documentId});

//Write a command that sets the name property of a document with a specific _id to 'Bizz Bar Bang'. Make sure that you're not //replacing the existing document, but instead updating only the name property.
db.restaurants.findOne({})._id;
ObjectId("59074c7c057aaffaafb0da60")
var documentId = ObjectId("59074c7c057aaffaafb0da64");
db.restaurants.updateOne({_id: documentId}, {$set: {name: 'Bizz Bar Bang'}});

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