CREATE TABLE "past_winners" (
  "year" real,
  "men_s_singles" text,
  "women_s_singles" text,
  "men_s_doubles" text,
  "women_s_doubles" text,
  "mixed_doubles" text
);

Question: Women's doubles of cornelia marxer astrid wanger, and a Mixed doubles of mario minder astrid wanger, and a Women's singles of cornelia marxer has what highest year?
SQL: SELECT MAX("year") FROM "past_winners" WHERE "women_s_doubles"='cornelia marxer astrid wanger' AND "mixed_doubles"='mario minder astrid wanger' AND "women_s_singles"='cornelia marxer';

Question: Men's singles of kilian pfister, and a Women's doubles of astrid eidenbenz claudia jehle has what average year?
SQL: SELECT AVG("year") FROM "past_winners" WHERE "men_s_singles"='kilian pfister' AND "women_s_doubles"='astrid eidenbenz claudia jehle';

Question: Women's singles of michaela ritter, and a Men's singles of andreas radl has what women's doubles?
SQL: SELECT "women_s_doubles" FROM "past_winners" WHERE "women_s_singles"='michaela ritter' AND "men_s_singles"='andreas radl';

Question: Women's singles of astrid eidenbenz, and a Men's doubles of no competition is part of mixed doubles?
SQL: SELECT "mixed_doubles" FROM "past_winners" WHERE "women_s_singles"='astrid eidenbenz' AND "men_s_doubles"='no competition';