FIND THE all CHECKING BALANCE OF ALL ACCOUNTS
select balance from checking
FIND THE SAVING BALANCE OF ALL ACCOUNTS
select balance from savings
SORT ALL THE TOTAL BALANCE OF CHECKING AND SAVING ACCOUNT IN ASCENDING ORDER
select t1.balance + t2.balance from checking as t1 join savings as t2 on t1.custid = t2.custid order by t1.balance + t2.balance