We have already seen several examples of basic queries in this guide, and on this page, you’ll learn in detail how to use the various features of query operations to read data from a server.

Understand how to structure GraphQL queries to request exactly the data you need — including fields, variables and fragments. Explore how to modify data with mutations, including how to update and …

Because the shape of a GraphQL query closely matches the result, we can predict what the query will return without knowing that much about the server. But it’s useful to have an exact description of the …

To describe what happens when a query is executed, let’s walk through an example:

Send a GraphQL query to your API and get precisely the data you request — no over-fetching, no under-fetching. Predictable responses keep apps efficient and performant.

The examples in this guide are based on a modified version of the SWAPI GraphQL schema. Because these queries are designed for illustrative purposes, they will not run on the full version of the SWAPI …

On this page, we’ll explore how clients can subscribe to details of events on a GraphQL server using subscription operations. Many of the features of GraphQL operations that apply to queries also apply …

When receiving an HTTP GET request, the GraphQL document should be provided in the query parameter of the query string. For example, if we wanted to execute the following GraphQL query:

On this page, you’ll learn how to use mutation operations to write data using GraphQL, and do so in a way that supports client use cases. All of the features of GraphQL operations that apply to queries …

A GraphQL library for .NET Core. Easily expose you data model as a GraphQL API or bring together multiple data sources into a single GraphQL schema.