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:. Now use the aggregation framework to calculate the author with the greatest number of comments. This is why there are only documents and zip codes , and all of them are in New York, Connecticut, New Jersey, and California. The answer for CT and NJ using this data set is A city might have multiple zip codes. 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.

The documents look like this: The project operator can extract the first digit from any field. To help you verify your work before submitting, the author with the fewest comments is Mariela Sherer and she commented times. You need to group twice to solve this problem. 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. The documents look like this: Please choose your answer below for the most prolific comment author: Some students have three homework assignments, etc.

After that, you just need to sort. Download the handout and mongoimport.

# MongoDB university mp chapter 5 homework – bigmongodb

Then import into your blog database as follows:. When you mongoimport the data, you will probably see a few duplicate key errors; this is to be expected, and will not prevent the mongoimport from working.

Now use the aggregation framework to calculate the author with the greatest number of comments. The answer for CT and NJ using this data set is Those students achieved a class average of You will need to probably change your projection to send more info through than just that first character. This is why there are only documents and zip codesand all of them are in New York, Connecticut, New Jersey, and California. Friday, 8 September Week 5: For this set, there are only documents and zip codesand all of them are in Homewor York, Connecticut, New Jersey, and California.

Who’s the easiest grader on campus? You must figure out the GPA that each student has achieved in a class and then average those numbers to get a class average. For example, to extract the first digit from the city field, you could write this query: Please round the answer to a whole number. Choose the answer below. Some students have three homework assignments, etc. To be clear, each student’s average includes only exams and homework grades.

A city might have multiple zip codes. For this problem, assume that 5.1 city name that appears in more than one state represents two separate cities. For this problem, we have used a subset of the data you previously used in zips. Different states might have the same city name.

Try for your self. Don’t include their quiz scores in the calculation. If you prefer, you may download the handout and perform your analysis on your machine with.

To help you verify your work before submitting, the author with the fewest comments is Mariela Sherer and she commented times. You must figure out the GPA that each student has achieved in a class and then average those numbers to get a class average.

Choose the answer below. Import it into your mongod using the following command from the command line:.

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Check all that apply. Once you’ve generated your aggregation query and found your answer, select it from the choices below. Start by downloading the handout zip file for this problem.