what is the total amount of all business loans?
select sum(amount) from loan where loan_type = 'Business'
what are the names of bank branches that provide these loans?
select t1.bname from bank as t1 join loan as t2 on t1.branch_id = t2.branch_id where t2.loan_type = 'Business'
which cities are these banks located at?
select t1.city from bank as t1 join loan as t2 on t1.branch_id = t2.branch_id where t2.loan_type = 'Business'