With less than 1 Championship, what es the Established date of the Niagara Rugby Union League?
CREATE TABLE "amateur_and_junior_clubs" (
  "club" text,
  "league" text,
  "venue" text,
  "established" real,
  "championships" real
);
SELECT SUM("established") FROM "amateur_and_junior_clubs" WHERE "championships"<1 AND "league"='niagara rugby union';