Question (Thai):  ผู้ที่ซื้อกล้อง Canon DSLR มีบัตรประจำตัวจำนวนเท่าใด
Question (English): How many ticket ID were conducted by the person who purchased Canon DSLR Camera?
Table: customer
Pandas: df[df['Product_Purchased'] == 'Canon DSLR Camera'].shape[0]