List the names of shops that have no devices in stock.
SELECT Shop_Name FROM shop WHERE Shop_ID NOT IN (SELECT Shop_ID FROM stock)
SELECT Shop_Name FROM shop WHERE Shop_ID NOT IN (SELECT Shop_ID FROM stock)
[{'Shop_Name': 'Pentre store'}, {'Shop_Name': 'Tynewydd repair'}, {'Shop_Name': 'Dinas store'}, {'Shop_Name': 'Naval repair'}, {'Shop_Name': "Naval's shop"}, {'Shop_Name': 'National Cellphone'}]