Task: Text to Code
Input (English): Step 1: For each row in invoices table, find corresponding rows in customers table and in invoice_lines table.
Step 2: find first_name, last_name of the results of step 1 ordered ascending by unit_price.
Step 3: 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 JOIN invoice_lines AS T3 ON T2.id = T3.invoice_id ORDER BY T3.unit_price Asc LIMIT 10