Queries Of GraphQL

 

Basic Query:

A basic query to retrieve a specific field from the GraphQL schema.

query { hello }

Query with Multiple Fields:

A query to retrieve multiple fields from the schema.

query { user(id: "123") { id name email } }

Query with Arguments:

A query with arguments to fetch data based on specific criteria.

query { user(id: "123") { id name email posts(limit: 5) { id title } } }

Query with Aliases:

Using aliases to rename fields in the response.

query { john: user(id: "123") { id name } jane: user(id: "456") { id name } }

Query with Fragments:

Using fragments to reuse common selections.

fragment UserData on User { id name email } query { user(id: "123") { ...UserData } }

Query with Variables:

Using variables to parameterize queries.

query GetUser($userId: ID!) { user(id: $userId) { id name } }

Nested Query:

A query with nested fields to retrieve related data.

query { user(id: "123") { id name posts { id title comments { id text } } } }

Fragments with Nested Fields:

Using fragments with nested fields to organize complex queries.

fragment PostData on Post { id title author { id name } comments { id text } } query { post(id: "123") { ...PostData } }

Query with Pagination:

Fetching paginated data using pagination arguments.

query { posts(page: 1, pageSize: 10) { id title } }

Query with Sorting:

Fetching data with sorting parameters.

query { users(sortBy: "name", sortOrder: "asc") { id name } }

Query with Filtering:

Fetching filtered data based on specific criteria.

query { users(filter: { status: "active" }) { id name } }

Nested Filtering:

Filtering based on nested fields.

query {

  posts(authorId: "123", filter: { published: true }) {

    id

    title

  }

}

Query with Directives:

Using directives to conditionally include fields.

query { user(id: "123") { id name posts { id title comments @include(if: $includeComments) { id text } } } }

In this query, the comments field will only be included if the includeComments variable is true.

Query with Fragments Spreading:

Spreading fragments across multiple fields.

fragment UserData on User { id name } fragment PostData on Post { id title author { ...UserData } } query { post(id: "123") { ...PostData } }

These examples illustrate various advanced techniques and best practices for constructing GraphQL queries to efficiently retrieve data from the API. By leveraging these features, developers can build powerful and flexible client applications that interact seamlessly with GraphQL APIs.