แทร็กที่ Dean Peeters ซื้อคืออะไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What are the tracks that Dean Peeters bought?It is not neccessary to use all the tables.
 tracks:  id [ number]  name [ text]  album_id [ number]  media_type_id [ number]  genre_id [ number]  composer [ text]  milliseconds [ number]  bytes [ number]  unit_price [ number] 
SELECT T1.name FROM tracks AS T1 JOIN invoice_lines AS T2 ON T1.id = T2.track_id JOIN invoices AS T3 ON T3.id = T2.invoice_id JOIN customers AS T4 ON T4.id = T3.customer_id WHERE T4.first_name = "Daan" AND T4.last_name = "Peeters"