List the name of singers in ascending order of net worth.
SELECT Name FROM singer ORDER BY Net_Worth_Millions ASC
SELECT Name FROM singer ORDER BY Net_Worth_Millions ASC
[{'Name': 'Abigail Johnson'}, {'Name': 'Susanne Klatten'}, {'Name': 'Gina Rinehart'}, {'Name': 'Iris Fontbona'}, {'Name': 'Jacqueline Mars'}, {'Name': 'Alice Walton'}, {'Name': 'Christy Walton'}, {'Name': 'Liliane Bettencourt'}]