CREATE TABLE "1998_99_season_as_a_five_year_old" (
  "result" text,
  "date" text,
  "race" text,
  "venue" text,
  "group" text,
  "distance" text,
  "weight_kg" real,
  "jockey" text,
  "winner_2nd" text
);

Question: Name the most weight
SQL: SELECT MAX("weight_kg") FROM "1998_99_season_as_a_five_year_old";

Question: Name the date for moonee valley
SQL: SELECT "date" FROM "1998_99_season_as_a_five_year_old" WHERE "venue"='Moonee Valley';