ผู้เล่นคนใดมีเงินเดือนสูงสุดในปี 2558?ไม่จำเป็นต้องใช้ตารางทั้งหมด
Who is the player had the highest salary in 2015?It is not neccessary to use all the tables.
 hall_of_fame:  player_id [ text]  yearid [ number]  votedby [ text]  ballots [ text]  needed [ text]  votes [ text]  inducted [ text]  category [ text]  needed_note [ text] 
SELECT player_id FROM salary WHERE year = "2015" ORDER BY salary DESC LIMIT 1