Peter Deluise กำกับ Stargate SG-1 กี่ฤดูกาล?ไม่จำเป็นต้องใช้ตารางทั้งหมด
How many seasons did Peter Deluise direct Stargate SG-1?It is not neccessary to use all the tables.
 table_15431959_1:  (no_in_season [ INTEGER ] directed_by [ VARCHAR) ]
SELECT MAX(no_in_season) FROM table_15431959_1 WHERE directed_by = "Peter DeLuise"