3 ทีมไหนเล่นมาหลายฤดูกาลแล้ว ?ไม่จำเป็นต้องใช้ทุกโต๊ะ
which three teams have been playing for the most seasons ?It is not neccessary to use all the tables.
 table_204_506:  id [ number]  "seasons" [ number]  "team" [ text]  "ch.wins" [ number]  "promotions" [ number]  "relegations" [ number] 
SELECT "team" FROM table_204_506 WHERE "seasons" = (SELECT MAX("seasons") FROM table_204_506)