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MongoDB Fundamentals

You're reading from   MongoDB Fundamentals A hands-on guide to using MongoDB and Atlas in the real world

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Product type Paperback
Published in Dec 2020
Publisher Packt
ISBN-13 9781839210648
Length 748 pages
Edition 1st Edition
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Authors (4):
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Juned Ahsan Juned Ahsan
Author Profile Icon Juned Ahsan
Juned Ahsan
Liviu Nedov Liviu Nedov
Author Profile Icon Liviu Nedov
Liviu Nedov
Amit Phaltankar Amit Phaltankar
Author Profile Icon Amit Phaltankar
Amit Phaltankar
Michael Harrison Michael Harrison
Author Profile Icon Michael Harrison
Michael Harrison
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Toc

Table of Contents (15) Chapters Close

Preface
1. Introduction to MongoDB 2. Documents and Data Types FREE CHAPTER 3. Servers and Clients 4. Querying Documents 5. Inserting, Updating, and Deleting Documents 6. Updating with Aggregation Pipelines and Arrays 7. Data Aggregation 8. Coding JavaScript in MongoDB 9. Performance 10. Replication 11. Backup and Restore in MongoDB 12. Data Visualization 13. MongoDB Case Study Appendix

Limiting, Skipping, and Sorting Documents

So far, we have learned how to write basic and complex queries and to project fields in the resulting documents. In this section, you will learn how to control the number and order of documents returned by a query.

Let's talk about why the amount of data a query returns needs to be controlled. In most real-world cases, you won't be using all the documents your query matches to. Imagine that a user of our movie service is planning to watch a drama movie tonight. They will visit the movie store and search for drama movies and find that there are more than 13,000 of these in the collection. With such a large search result, they might spend the entire night just looking through the various movies and deciding which one to watch.

For a better user experience, you may want to show the 10 most popular movies in the drama category at a time, followed by the next 10 in the sequence, and so on. This technique of serving data is known...

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