CREATE TABLE table_204_785 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

which nation received the least number of gold medals ?
SELECT "nation" FROM table_204_785 ORDER BY "gold" LIMIT 1
SELECT "nation" FROM "table_204_785" ORDER BY "gold" NULLS FIRST LIMIT 1