Question: Can you show me the name of the bank branch providing the greatest total amount of loans to customers?
SQL: SELECT T2.bname FROM loan AS T1 JOIN bank AS T2 ON T1.branch_id   =   T2.branch_id JOIN customer AS T3 ON T1.cust_id   =   T3.cust_id GROUP BY T2.bname ORDER BY sum ( T1.amount )  DESC limit 1