CREATE TABLE table_204_211 (id NUMBER, "rank" NUMBER, "nation" CLOB, "gold" NUMBER, "silver" NUMBER, "bronze" NUMBER, "total" NUMBER)

who is the only country to win only golds ?
SELECT "nation" FROM table_204_211 WHERE "silver" = 0 AND "bronze" = 0
SELECT "nation" FROM "table_204_211" WHERE "bronze" = 0 AND "silver" = 0