Book Image

Guide to NoSQL with Azure Cosmos DB

By : Gaston C. Hillar, Daron Yöndem
Book Image

Guide to NoSQL with Azure Cosmos DB

By: Gaston C. Hillar, Daron Yöndem

Overview of this book

Cosmos DB is a NoSQL database service included in Azure that is continuously adding new features and has quickly become one of the most innovative services found in Azure, targeting mission-critical applications at a global scale. This book starts off by showing you the main features of Cosmos DB, their supported NoSQL data models and the foundations of its scalable and distributed architecture. You will learn to work with the latest available tools that simplify your tasks with Cosmos DB and reduce development costs, such as the Data Explorer in the Azure portal, Microsoft Azure Storage Explorer, and the Cosmos DB Emulator. Next, move on to working with databases and document collections. We will use the tools to run schema agnostic queries against collections with the Cosmos DB SQL dialect and understand their results. Then, we will create a first version of an application that uses the latest .NET Core SDK to interact with Cosmos DB. Next, we will create a second version of the application that will take advantage of important features that the combination of C# and the .NET Core SDK provides, such as POCOs and LINQ queries. By the end of the book, you will be able to build an application that works with a Cosmos DB NoSQL document database with C#, the .NET Core SDK, LINQ, and JSON.
Table of Contents (13 chapters)
Title Page
Packt Upsell

Working with schema-agnostic queries

The VideoGames1 collection has two documents. The document with id equal to 2 has a platforms key whose value is an array of string with the platforms in which the video game can be executed. The document with id equal to 1 doesn't include the platforms key.

Now we will write a query that will indicate the properties we want to retrieve from all the documents in the collection. Specifically, we will specify we want to retrieve the name and platforms properties. In addition, we will request the results to be sorted by name in ascending order. The code file for the sample is included in the learning_cosmos_db_03_01 folder in the sql_queries/videogame_1_03.sql file:

FROM Videogames v 


You can follow the steps to execute the preceding query:

  1. Go to Azure Storage Explorer and navigate through the existing document database (Competition), its collection (VideoGames1), and its Documents element by expanding and...