Discover MongoDB's rise as the leading NoSQL database. Gain insights into using it with C#/.NET Core and MEAN Stack. Delve into practical projects and advanced concepts.

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MongoDB has quickly become the foremost NoSQL database on the market, having been adopted by companies of all sizes for the various benefits it offers toward building modern applications. In this interactive course, you'll get to see for yourself why there's so much hype around MongoDB, and learn all about how to use it.

You'll start off with an introduction to Relational and NoSQL databases, get into some basic command operations, and build up from there toward more advanced concepts. You'll then get into using MongoDB in C# and .NET Core as well as its uses in MEAN Stack. Throughout the way, you'll have the chance to use MongoDB to build interesting projects as you learn.

The Definitive Guide to MongoDB

In the [previous](https://www.educative.io/courses/definitive-guide-to-mongodb/create-read-operations) lesson, we looked at how the basic CRUD operations, create and read, could be performed using C#. Let's learn about some more of them below.
 
# Update Users

Documents can be updated in a similar manner:

public async Task<bool> UpdateUser(ObjectId id, string udateFieldName, string updateFieldValue)
{
    var filter = Builders<User>.Filter.Eq("_id", id);
    var update = Builders<User>.Update.Set(udateFieldName, updateFieldValue);

    var result = await _usersCollection.UpdateOneAsync(filter, update);

    return result.ModifiedCount != 0;
}

In this example, function `UpdateOneAsync` is used, but if you want to change values of multiple documents, you can use `UpdateMultipleAsync`. 

Synchronous siblings of these operations also exist.

## Implementation

Now, let's look at the executable code for the *Update Users* function discussed above. 

The output of this executable will be displayed in the terminal tab.

This lesson will teache you how to perform the update and delete user operations in C#. It will also teache you how to create indexes.

Introduction to NoSQL and Polyglot Persistence

Getting Started Using MongoDB

High Availability and High-Throughput Configurations

Using MongoDB in C# and .Net Core

Using MongoDB with Node.js, Express and Angular

Serverless & MongoDB Atlas

Appendix

Update, Delete & Index Operations

Update Users