example graphQL schema

city.schema

type City {
  id: ID!,
  name: String!,
  country: String!,
}

type Query {
  fetchCity(id: ID!): City 
}

schema {
  query: Query
}

create-city.graphql

mutation a {
  createCity(input: {
  name: "Cape Town",
  country: "South Africa"
  }) {
    id
  }
}

fetch-city.graphql

query b {
  fetchCity(id: "{CITY ID}") {
    id,
    name,
    country
  }
}