CREATE TABLE "past_winners" (
  "year" real,
  "mens_singles" text,
  "womens_singles" text,
  "mens_doubles" text,
  "womens_doubles" text,
  "mixed_doubles" text
);

Question: In 2004, where the womens singles is daniela kressig who is the mens singles
SQL: SELECT "mens_singles" FROM "past_winners" WHERE "womens_singles"='Daniela Kressig';

Question: What is the most current year where the women's doubles champions are astrid eidenbenz claudia jehle
SQL: SELECT MAX("year") FROM "past_winners" WHERE "womens_doubles"='Astrid Eidenbenz Claudia Jehle';

Question: In the year 2006, the womens singles had no competition and the mens doubles were roland hilti kilian pfister, what were the womens doubles
SQL: SELECT "womens_doubles" FROM "past_winners" WHERE "womens_singles"='no competition' AND "mens_doubles"='Roland Hilti Kilian Pfister' AND "year"=2006;

Question: In 2001, where the mens singles is armand jehle and the womens singles is michaela ritter, who are the mixed doubles
SQL: SELECT "mixed_doubles" FROM "past_winners" WHERE "womens_singles"='Michaela Ritter' AND "mens_singles"='Armand Jehle';

Question: In 1987 who was the mens singles
SQL: SELECT "mens_singles" FROM "past_winners" WHERE "year"=1987;