The problem with equating SQL and GraphQL is you are not expected to write the RDBMS. One day it may be as easy as creating a DB schema; for now I will focus on developing RPC APIs.
Have you checked out https://hasura.io? That may be exactly what you are looking for. You create DB schema (Postgres in Hasura's case) and point Hasura to Postgres to get an instant realtime GraphQL CRUD.
