Order by cluase

Question

hi i would like to sory by alphabets defined in the order by clause
like for ex
select * from employee
order by ename ----(starting by letter L)
please help

Answer 1

If you want to order by some different sort sequence, one approach is to use a function, eg:
create function ROT13(varchar2 in p_text) return varchar2
is
    l_result varchar2(100) := null;
begin
    for i in 0..length(p_text)
        l_result := l_result ||
                       case when p_text(i) <= chr(ascii('A') + 13) then chr(ascii(p_text(i)) + 13)
                       else chr(ascii(p_text(i) - 13)
                       end;
    end loop;
    return l_result
end;
select * from employee
order by ROT13(ename)
/This example shows that that names can be sorted based on whatever character sequence you define...
(NB you can calculate ROT13 using a regular expression if you prefer)
HTH
Regards Nigel