MONGODB HOMEWORK 5.4

We will take these are the prefered cities to live in chosen by this instructor, given is special affection to this set of characters! 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:. Your task is to calculate the class with the best average student performance. Who’s the easiest grader on campus? 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.

Import it into your mongod using the following command from the command line:. The documents look like this: 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 example, to extract the first character from the city field, you could write this pipeline:. A city might have multiple zip codes. Your task is to calculate the class with the best average student performance.

You need to group twice to solve this problem.

Study IQ World: Week 5 : AGGREGATION FRAMEWORK : MP: MongoDB for Developers

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

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mongodb homework 5.4

Don’t include mongodn quiz scores in the calculation. This involves calculating an average for each student in each class of all non-quiz assessments and then averaging those numbers to get a class average.

Crunching the Zipcode dataset Please calculate the average population of cities in California abbreviation CA and New York NY taken together with populations over 25, To be clear, each student’s average includes only exams and homework grades.

Friday, 8 September Week 5: After that, you just need to sort.

For example, to extract the first character from the city field, you could write this pipeline:. A city might have multiple zip codes.

mongodb homework 5.4

You must figure out the GPA that each student has achieved in a class and then average those numbers to get a class average. Now use the aggregation framework to calculate the author with the greatest number of comments. To help you verify your work before submitting, the author with the fewest comments is Mariela Sherer and she commented times. In this assignment you will use the aggregation framework to find the most frequent author of comments on your blog For this set, there are only documents and zip codesand all of them are in New York, Connecticut, New Jersey, and California.

Try for your self. You will be using the zip code collection data set, which you will find in the ‘handouts’ link in this page. The answer for CT and NJ using this data set is Once you’ve generated your aggregation query and found your answer, select it from the choices below.

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MongodbChamps: MJ: MongoDB for Java Developers Homework

Please choose your answer below for the most prolific comment author:. Who’s the easiest grader on campus? Please round the answer to a whole number. Import it into your mongod using the following command from the command line:.

mongodb homework 5.4

We will take these are the prefered cities to live in chosen by this instructor, given is special affection to this set mongod characters! 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. Note that not all students in the same class have the same exact number of assessments.

For this problem, we have used a subset of the data you previously used in zips. The documents look like this: Different states might have the same city name. If you notice that while importing, there are a few duplicates fear not, this is expected and will not affect your answer. Some students have three homework assignments, etc.

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Check all that apply. Prefered Cities to Live! For this problem, assume that a city name that appears in more than one state represents two separate cities.