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

Question: Which women's double took place in 2006?
SQL: SELECT "women_s_doubles" FROM "previous_winners" WHERE "year"='2006';

Question: Which women's single had Cai Jaini Qi Yu on the women's doubles team?
SQL: SELECT "women_s_singles" FROM "previous_winners" WHERE "women_s_doubles"='cai jaini qi yu';

Question: Which women's doubles had Tine Rasmussen on the women's singles?
SQL: SELECT "women_s_doubles" FROM "previous_winners" WHERE "women_s_singles"='tine rasmussen';