2r มีกี่รอบ?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many rounds were 2r?It is not neccessary to use all the tables.
 table_16645:  "Edition" [ real]  "Zone" [ text]  "Round" [ text]  "Date" [ text]  "Against" [ text]  "Surface" [ text]  "Opponent" [ text]  "Outcome" [ text]  "Result" [ text] 
SELECT COUNT("Result") FROM table_16645 WHERE "Round" = '2R'