A list of the top 8 countries by gross/total invoice size. List country name and gross invoice size.
SELECT billing_country ,  SUM(total) FROM invoices GROUP BY billing_country ORDER BY SUM(total) DESC LIMIT 8;
SELECT billing_country ,  SUM(total) FROM invoices GROUP BY billing_country ORDER BY SUM(total) DESC LIMIT 8;
[{'billing_country': 'USA', 'SUM(total)': 523.0600000000003}, {'billing_country': 'Canada', 'SUM(total)': 303.9599999999999}, {'billing_country': 'France', 'SUM(total)': 195.09999999999994}, {'billing_country': 'Brazil', 'SUM(total)': 190.09999999999997}, {'billing_country': 'Germany', 'SUM(total)': 156.48}, {'billing_country': 'United Kingdom', 'SUM(total)': 112.85999999999999}, {'billing_country': 'Czech Republic', 'SUM(total)': 90.24000000000001}, {'billing_country': 'Portugal', 'SUM(total)': 77.23999999999998}]