Task: Text to Code
Input (English): Step 1: For each row in customers table, find the corresponding rows in invoices table.
Step 2: find the summation of total of each value of first_name in the results of step 1.
Step 3: find first_name, last_name of step 1 results ordered descending by the results of step 2.
Step 4: only show the first 10 rows of the results
Output (English): SELECT T1.first_name , T1.last_name FROM customers AS T1 JOIN invoices AS T2 ON T1.id = T2.customer_id GROUP BY T1.first_name ORDER BY Sum ( T2.total ) Desc LIMIT 10