To move into a db - use database name

to get the collections names in said db - db.getCollectionNames()

To get all of the files in the collection - db.collectionname.find()

command that makes the first 10 restaurants appear when db.restaurants is alphabetically sorted by the name property - db.collectionname.find().sort({name:1}).limit(10);

Get by id
first get the id using: db.restaurants.findOne({}, {_id: 1})._id
Then get the whole object using: db.restaurants.findOne({_id: objectId})

Get by value
db.restaurants.find({borough: "Queens"})

Count
db.restaurants.count()

Count by nested value
finding by nested value: db.restaurants.find( {"address.zipcode": "10003"})
then counting it, chain the count: db.restaurants.find( {"address.zipcode": "10003"}).count()

Delete by Id
db.restaurants.deleteOne({_id: objectId})

Update a property
db.restaurants.updateOne({_id: objectId}, {$set: {name: "Bizz bar Bang"}})

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