https://www.thoughtworks.com/insights/blog/nosql-databases-overview

apt-get install mongodb

mongoimport --db test --collection restaurants --drop --file r.json

show dbs

use test

db.restaurants.find( { "borough": "Manhattan" } )
db.restaurants.find( { "borough": "Manhattan" } ).pretty()

db.restaurants.find( { "address.zipcode": "10075" } )

db.restaurants.find( { "grades.grade": "B" } )

db.restaurants.find( { "grades.score": { $lt: 10 } } )

db.restaurants.find( { "cuisine": "Italian", "address.zipcode": "10075" } )

db.restaurants.find(
   { $or: [ { "cuisine": "Italian" }, { "address.zipcode": "10075" } ] }
)

db.restaurants.find().sort( { "borough": 1, "address.zipcode": 1 } )

db.restaurants.update(
    { "name" : "Juni" },
    {
      $set: { "cuisine": "American (New)" },
      $currentDate: { "lastModified": true }
    }
)


db.restaurants.remove( { "borough": "Manhattan" } )

db.restaurants.aggregate(
   [
     { $group: { "_id": "$borough", "count": { $sum: 1 } } }
   ]
)




db.restaurants.aggregate(
   [
     { $match: { "borough": "Queens", "cuisine": "Brazilian" } },
     { $group: { "_id": "$address.zipcode" , "count": { $sum: 1 } } }
   ]
)