CREATE TABLE "2002_03_season_as_a_four_year_old" (
  "result" text,
  "date" text,
  "race" text,
  "venue" text,
  "group" text,
  "distance" text,
  "weight_kg" text,
  "time" text,
  "jockey" text,
  "winner_2nd" text
);

Question: How many entries are there for weight when the winner is 1st - defier and venue is randwick?
SQL: SELECT COUNT("weight_kg") FROM "2002_03_season_as_a_four_year_old" WHERE "winner_2nd"='1st - Defier' AND "venue"='Randwick';

Question: Who was the jockey at Rosehill and the weight was 57.5 kg?
SQL: SELECT "jockey" FROM "2002_03_season_as_a_four_year_old" WHERE "venue"='Rosehill' AND "weight_kg"='57.5';

Question: When the time is 1:36.30 what shows as winner?
SQL: SELECT "winner_2nd" FROM "2002_03_season_as_a_four_year_old" WHERE "time"='1:36.30';