2.1.1 쉘 시작하기

$ mongo
MongoDB shell version v4.0.6
connecting to: mongodb://127.0.0.1:27017/?gssapiServiceName=mongodb
MongoDB server version: 4.0.6
>

2.1.2 데이터베이스 / 컬렉션 / 도큐먼트

# 데이터베이스 목록 확인
> show dbs
admin   0.000GB
config  0.000GB
local   0.000GB
test    0.000GB

# test 데이터베이스로 전환
> use test
switched to db test

# 컬렉션 목록 확인
> show collections
categories
orders
products
reviews
setTest
users
voter_ids_temp

# 질의
> db.reviews.find();
{ "_id" : ObjectId("4c4b1476238d3b4dd5000041"), "product_id" : ObjectId("4c4b1476238d3b4dd5003981"), "date" : ISODate("2010-06-07T07:00:00Z"), "title" : "Amazing", "text" : "Has a squeaky wheel, but still a darn good wheel barrow.", "rating" : 4, "user_id" : ObjectId("4c4b1476238d3b4dd5000001"), "username" : "dgreenthumb", "helpful_votes" : 3, "voter_ids" : [ ObjectId("4c4b1476238d3b4dd5000041"), ObjectId("7a4f0376238d3b4dd5000003"), ObjectId("92c21476238d3b4dd5000032") ] }
{ "_id" : ObjectId("4c4b1476238d3b4dd5000042"), "product_id" : ObjectId("4c4b1476238d3b4dd5003982"), "user_id" : ObjectId("4c4b1476238d3b4dd5000001"), "rating" : 3, "helpful_votes" : 7 }
{ "_id" : ObjectId("4c4b1476238d3b4dd5000043"), "product_id" : ObjectId("4c4b1476238d3b4dd5003981"), "user_id" : ObjectId("4c4b1476238d3b4dd5000002"), "rating" : 5, "helpful_votes" : 7 }
{ "_id" : ObjectId("4c4b1476238d3b4dd5000044"), "product_id" : ObjectId("4c4b1476238d3b4dd5003982"), "user_id" : ObjectId("4c4b1476238d3b4dd5000002"), "rating" : 4, "helpful_votes" : 1 }
{ "_id" : ObjectId("4c4b1476238d3b4dd5000045"), "product_id" : ObjectId("4c4b1476238d3b4dd5003981"), "user_id" : ObjectId("4c4b1476238d3b4dd5000003"), "rating" : 4, "helpful_votes" : 10 }