วันไหนที่มีผู้เข้าร่วมต่ำกว่า 80,000 คน ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
which dates had below 80,000 in attendance ?It is not neccessary to use all the tables.
 table_204_55:  id [ number]  "date" [ text]  "time" [ text]  "opponent#" [ text]  "rank#" [ text]  "site" [ text]  "tv" [ text]  "result" [ text]  "attendance" [ number] 
SELECT "date" FROM table_204_55 WHERE "attendance" < 80000