Greg Norman มีรายได้เฉลี่ยเท่าไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What is the average earnings made by Greg Norman?It is not neccessary to use all the tables.
 table_name_49:  (earnings___ [ INTEGER ] player [ VARCHAR) ]
SELECT AVG(earnings___) AS $__ FROM table_name_49 WHERE player = "greg norman"