Roy Emerson ชนะ Australian Open กี่ครั้ง?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many times did Roy Emerson win the Australian Open?It is not neccessary to use all the tables.
 table_197638_6:  (australian_open [ VARCHAR ] player [ VARCHAR) ]
SELECT COUNT(australian_open) FROM table_197638_6 WHERE player = "Roy Emerson"