ดินชนะกี่เหตุการณ์?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many events did clay win?It is not neccessary to use all the tables.
 table_66228:  "!Event" [ real]  "Round" [ text]  "Surface" [ text]  "Winner" [ text]  "Opponent" [ text]  "Result" [ text] 
SELECT COUNT("!Event") FROM table_66228 WHERE "Winner" = 'clay'