At the end I just want to say if you want to learn mongoDB, First practice with youself. Using the aggregation framework, calculate the sum total of people who are living in a zip code where the city starts with one of those possible first characters. Different states might have the same city name. Prefered Cities to Live! For this problem, we have used a subset of the data you previously used in zips. Download the handout and mongoimport. You must figure out the GPA that each student has achieved in a class and then average those numbers to get a class average.

A city might have multiple zip codes. Using the aggregation framework, calculate the sum total of people who are living in a zip code where the city starts with one of those possible first characters. For this problem, we have used a subset of the data you previously used in zips. Who’s the easiest grader on campus? Now use the aggregation framework to calculate the author with the greatest number of comments.

Some students have three homework assignments, etc. If you notice that while importing, there are a few duplicates fear not, this is expected and will not affect your answer.

Check all that apply. Try for your self. Friday, 8 September Week 5: Who’s the easiest grader on campus? Mm101 that, you just need to sort. Prefered Cities to Live! Now use the aggregation framework to calculate the author with the greatest number of comments. You yomework be using the zip code collection data set, which you will find in the ‘handouts’ link in this page. Different states might have the same city name. In this problem you will calculate the number of people who live in a zip code in the US where the city starts with one of the following characthers:.

Download the handout and mongoimport. Note that not all students in the same class have the same exact number of assessments.

The documents look like this: To be clear, each student’s average includes only exams and homework grades. Start by downloading the handout zip file for this problem. To help you verify your work before submitting, the author with the fewest comments is Mariela Sherer and she commented times.

## Mongodb M101J Homework 1 1 Answers

Once you’ve generated your aggregation query and found your answer, select it from the choices below. You will need to probably change your projection to send more info through than just that first character.

In this assignment you will use the aggregation framework to find the most frequent author of comments on your blog. We will be using a data set similar to ones we’ve used before. In this assignment you will use the aggregation framework to find the most frequent author of comments on your blog Choose the answer below.

You need to group twice to solve wnswer problem. We will take these are the prefered cities to live in chosen by this instructor, given is special affection to this set of characters! For this problem, assume that a city name that appears in more than one state represents two separate cities. The answer for CT and NJ using this data set is Please use the Aggregation pipeline to solve this problem.

For this problem, we have used a subset of the data ansder previously used in zips.

# [SOLUTION] WEEK 5 : INDEXES AND PERFORMANCE : MJS: MONGODB FOR DEVELOPERS

You must figure out the GPA that each student has achieved in a class homeaork then average those numbers to get a class average. For example, to extract the first character from the city field, you could write this pipeline:.

Your task is to calculate the class with the best average student performance.

Also, you will need a filtering step to get rid of all documents where the city does not start with the select set of initial characters.

Those students achieved a class average of