พื้นผิวของเกมส่วนใหญ่เป็นอย่างไร ?ไม่จำเป็นที่จะต้องใช้โต๊ะทั้งหมด
what was the surface at most of the games ?It is not neccessary to use all the tables.
 table_204_487:  id [ number]  "score" [ text]  "location" [ text]  "venue" [ text]  "door" [ text]  "surface" [ text] 
SELECT "surface" FROM table_204_487 GROUP BY "surface" ORDER BY COUNT(*) DESC LIMIT 1