This is a guide of work that determines the topic of MongoDB database design. An obligatory condition to reading is not presenting this work as your own. However, if you can’t arrange your work in the proper way, you may get help from Assignment.EssayShark.com. If you decide to place an order on our site, describe your problem, include your requirements, and set the deadline. You can also mention what specific material an expert should use while completing your order, but it is not necessary.
Our service provides help not only with IT assignments, but other disciplines as well. At the end, you may request free revisions if you don’t like something in the completed order. Our experts can deal with assignments of any difficulty level. Moreover, we have reasonable prices, so any student can afford using our service. Below you will find a sample of an IT assignment, but keep in mind that you can’t duplicate it in your own work.
General Principles of Designing and Using MongoDB Database
In this guide, I will tell you about the document-oriented data modeling and organization of data in MongoDB at the levels of database, collection, and document. In addition, we will learn how to use some of the operations in MongoDB.
We need to write two queries with grouping and two queries using aggregate functions to their subject area in MongoDB.
Here is how we count the number of records in the collection called “Info1”:
And here is how we count values of the field “id” in all records of “Info1” collection:
We need to run the following commands to sort an “Info1” collection:
Output the records where the field “requests.topic” is equal to “HI”.
The following is the execution of the counterpart of the JOIN command using Map-reduce:
Here is the result of execution of the JOIN command:
Thanks for your attention!