SELECT sum(amount) ,  T1.bname FROM bank AS T1 JOIN loan AS T2 ON T1.branch_id  =  T2.branch_id GROUP BY T1.bname
Find the total amount of loans offered by each bank branch.
[Schema (values) (types)]: | loan_1 |  bank : branch_id (text) , bname (number) , no_of_customers (text) , city (number) , state (text) | customer : cust_id (text) , cust_name (number) , acc_type (text) , acc_bal (number) , no_of_loans (text) , credit_score (text) , branch_id (text) , state (text) | loan : loan_id (text) , loan_type (number) , cust_id (text) , branch_id (number) , amount (text);