PL/SQL :: Create Or Replace Trigger After Insert On Transfer?

create or replace trigger aifer_transfer after insert on transfer for each new row begin     

   UPDATE Account SET balance = balance-:new.amount        WHERE acc_id = from_acc_id;        UPDATE Account SET balance = balance+:new.amount        WHERE acc_id = to_acc_id;      end if; end;     create or replace trigger bifer_transfer before insert on transfer for each new row begin      if get_balance(:new.from_acc_id) < :new.amount  then        raise_application_error(-20001, 'Not enough money in account!');        end if; end;   create or replace function get_balance(p_acc_id in number) return number as v_balance account.balance%type; begin select balance into v_balance from account where acc_id = p_acc_id; return v_balance; end;    select get_balance(123) from dual..................................................i am geting this error when executing the trigger..................................................Error report:ORA-01912: ROW keyword expected01912. 00000 -  "ROW keyword expected"*Cause:    keyword missing*Action: