When has a Record of 9–1, and a Tournament Champion of duke?
CREATE TABLE "champions_by_year" (
  "year" text,
  "regular_season_champion_s" text,
  "record" text,
  "tournament_champion" text,
  "tournament_venue" text,
  "tournament_city" text
);
SELECT "year" FROM "champions_by_year" WHERE "record"='9–1' AND "tournament_champion"='duke';