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

Question: What is the year in which Yong Yudianto won the men's singles?
SQL: SELECT MIN("year") FROM "previous_winners" WHERE "men_s_singles"='yong yudianto';

Question: Who won the men's singles in 1999?
SQL: SELECT "men_s_singles" FROM "previous_winners" WHERE "year"=1999;