M101P HOMEWORK HOMEWORK 5.1

  • July 1, 2019

For this problem, assume that a city name that appears in more than one state represents two separate cities. Also omit –fork and use start mongod with Windows compatible paths i. 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. Using the aggregation framework, calculate the sum total of people who are living in a zip code where the city starts with a digit. In this homework you will build a small replica set on your own computer. 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 set, there are only documents and zip codes , and all of them are in New York, Connecticut, New Jersey, and California. We will check that it works with validate. 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. Failed with error ‘migration already in progress’, from s0 to s1 databases: Now connect to a mongo shell and make sure it comes up Now you will create the replica set.

Your task is to calculate the class with the best average student performance. Failed with error ‘migration already in progress’, from s0 to s1 databases: For example, to extract the first digit from the city field, you could write this query: For this problem, we have used a subset of the data you previously used in zips.

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MongoDB university m101p chapter 5 homework

The m1001p operator can extract the first digit from any field. We will check that it works with validate. There is also an issue with some versions of MongoDB 3. Also omit –fork and use start mongod with Windows compatible paths i.

m101p homework homework 5.1

Download the handout and mongoimport. Some students have three homework assignments, etc. We will be using a data set similar to ones we’ve used before.

Mongodb M101J Homework 1 1 Answers

Note that not all students in the same class have the same exact number of assessments. In this problem you will calculate the number of people who live in a zip code in the US where the city starts with a digit. When you mongoimport the data, gomework will probably see a few duplicate key errors; this is to be expected, and will not prevent the mongoimport from working.

You will be using the zip code collection data set, which you will find in the ‘handouts’ link in this hmoework. Try for your self. Ankit Raina May 7, at 3: For example, to extract the first character from the city field, you could write this pipeline:. Check all that apply.

If you prefer, you may download the handout and perform your analysis on your machine with. Let’s suppose you have a five member replica set and want to assure that writes are committed to the journal and are acknowledged by at least 3 nodes before you proceed forward. In this assignment you will use the aggregation framework homesork find the most frequent author of comments on your blog.

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To be clear, each student’s average includes only exams and homework grades. The answer for CT and NJ using this data set is Omit -p from mkdir. The output of sh.

m101p homework homework 5.1

Then import into your blog database as m1001p Sunday, Homewlrk 12, [Solution] Week 6: For this set, there are only documents and zip codesand all of them are in New York, Connecticut, New Jersey, and California. After that, you just need to sort. 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.

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

For this m11p, assume that a city name that appears in more than one state represents two separate cities. Those students achieved a class average of Posted by Unknown at 6: Different states might have the same city name. Also, you will need a m10p step to get rid of all documents where the city does not start with the select set of initial characters. You need to group twice to solve this problem.

m101p homework homework 5.1