ประเทศใดมีเหรียญรางวัลมากที่สุด ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
which country had the highest number of medals ?It is not neccessary to use all the tables.
 table_203_812:  id [ number]  "rank" [ number]  "nation" [ text]  "gold" [ number]  "silver" [ number]  "bronze" [ number]  "total" [ number] 
SELECT "nation" FROM table_203_812 ORDER BY "total" DESC LIMIT 1