คู่ต่อสู้เพียงคนเดียวในปี 1984 คืออะไร?ไม่จำเป็นที่จะต้องใช้โต๊ะทั้งหมด
what is the only opponent in 1984 ?It is not neccessary to use all the tables.
 table_204_790:  id [ number]  "year" [ number]  "venue" [ text]  "opponent" [ text]  "score" [ text]  "w/l" [ text]  "round" [ text]  "notes" [ text] 
SELECT "opponent" FROM table_204_790 WHERE "year" = 1984