Backend2026-05-17
GraphQL
Also known as: GraphQL / グラフQL
An API specification designed by Facebook to solve REST's over- and under-fetching problems. Clients declare exactly what data they need; a strongly typed schema improves developer experience and tooling.
Overview
GraphQL enables client-driven data fetching compared to REST. A single endpoint query can retrieve multiple resources, reducing round-trips and payload size for mobile clients.
REST vs GraphQL
GraphQL excels in BFF and mobile APIs that need multiple entities in a single request. For simple CRUD, REST APIs often have less overhead. NestJS supports both transports in one framework.
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