David Duchovny กำกับตอนใด? ไม่จำเป็นต้องใช้ตารางทั้งหมด
What episode was directed by David Duchovny?It is not neccessary to use all the tables.
 table_13336122_7:  title [ VARCHAR]  directed_by [ VARCHAR] 
SELECT title FROM table_13336122_7 WHERE directed_by = "David Duchovny"