mongo

Question 1

mongo: To install and run mongo, type

Answer 1

brew install mongodb
mkdir -p /data/db
sudo chmod 777 /data/db
mongod

new terminal–
mongo

Question 2

mongo: To show all databases, type

Answer 2

show dbs

Question 3

mongo: To create a new db, type

Answer 3

use databaseName

Question 4

mongo: A db will not show up in show dbs if

Answer 4

If there is not data in it

Question 5

mongo: To see all collection form inside a db, type

Answer 5

show collections

Question 6

mongo: To return only 10 documents from a collection, type

Answer 6

db.collectionName.find().limit(10)

Question 7

mongo: In mongo a foreign key is called a

Answer 7

reference field

Question 8

mongo: A reference field should contain

Answer 8

ObjectID(“string”)

Question 9

mongo: To see the files in the current directory, type

Answer 9

ls()

Question 10

mongo: To load data into mongo, type

Answer 10

load(“./file.js”)

Question 11

pymongo: To get access to a database in mongodb, type

Answer 11

from pymongo import MongoClient
client = MongoClient(‘mongoURI’) # Find on mongolab
db = client.database_name

Question 12

pymongo; To create a new collection, type

Answer 12

db.new_collection_name.insert_one({“key”:”value”})

Question 13

pymongo: To easily insert a df into a mongo collection, type

Answer 13

from odo import odo

odo(df, db.collectionName)

Question 14

ipython: To run normal shell commands inside a notebook, type

Answer 14

! before the command