[Solution] Week 2 : CRUD : M101JS: MongoDB for Node.js Developers
Homework 2.1 :
Which of the choices below is the title of a movie from the year 2013 that is rated PG-13 and won no awards? Please query the video.movieDetails collection to find the answer.NOTE: There is a dump of the video database included in the handouts for the "Creating Documents" lesson. Use that data set to answer this question.
Solution :
Query : db.movieDetails.find({ "rated": "PG-13", "year": 2013, "awards.wins": 0})
Answer : A Decade of Decadence,Pt. 2: Legacy of Dreams
Homework 2.2 :
Using the video.movieDetails collection, which of the queries below would produce output documents that resemble the following. Check all that apply.NOTE: We are not asking you to consider specifically which documents would be output from the queries below, but rather what fields the output documents would contain.
{ "title" : "P.S. I Love You" }
{ "title" : "Love Actually" }
{ "title" : "Shakespeare in Love" }
Solution :
Homework 2.3 :
NOTE: There is a dump of the video database included in the handouts for the "Creating Documents" lesson. Use that data set to answer this question.
Solution :
Query : db.movieDetails.find({ "countries.1": "Sweden" })
Answer : 6
Homework 2.4 :
How many documents in our video.movieDetails collection list just the following two genres: "Comedy" and "Crime" with "Comedy" listed first.
NOTE: There is a dump of the video database included in the handouts for the "Creating Documents" lesson. Use that data set to answer this question.
Solution :
Query : db.movieDetails.find({ "genres": ["Comedy", "Crime"] }).count()
Answer : 20
Homework 2.5 :
As a follow up to the previous question, how many documents in the video.movieDetails collection list both "Comedy" and "Crime" as genres regardless of how many other genres are listed?
NOTE: There is a dump of the video database included in the handouts for the "Creating Documents" lesson. Use that data set to answer this question.
Solution :
Query : db.movieDetails.find({ "genres": {$all: ["Comedy", "Crime"] } })
Answer : 56
Homework 2.6 :
Suppose you wish to update the value of the "plot" field for one document in our "movieDetails" collection to correct a typo. Which of the following update operators and modifiers would you need to use to do this?
Solution :
Enjoy....!!!!
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