Introduction to GraphQL in QueryDeck

What is GraphQL?

GraphQL is a query language for APIs that allows clients to request precisely the data they need. Unlike REST, which exposes multiple endpoints for different resources, GraphQL provides a single flexible endpoint where clients specify their data requirements in a structured query format.

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Why Use GraphQL in QueryDeck?

QueryDeck supports GraphQL, enabling developers to interact with databases efficiently while minimizing over-fetching or under-fetching of data. With GraphQL in QueryDeck, you can:

• Fetch multiple related objects in a single request.

• Define specific fields to retrieve, reducing data payload size.

• Implement filtering, sorting, and pagination dynamically.

• Use mutations to insert, update, or delete data flexibly.

• Handle real-time subscriptions for live data updates.

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GraphQL vs. REST

Feature	GraphQL	REST
Data Fetching	Fetch only requested fields	Fetches all fields, even if unnecessary
Number of Endpoints	Single endpoint (/graphql)	Multiple endpoints per resource
Over-fetching	Avoids over-fetching by selecting fields	Can over-fetch unnecessary fields
Under-fetching	Retrieves nested data in one request	Requires multiple requests for related data
Batch Requests	Supports multiple queries in a single request	Requires multiple calls for different data