change output of table strings and numbers using ascii value modification, Oracle

change output of table strings and numbers using ascii value modification

--convert any column of tables to its ascii value for some range and apply logic.
--if some one has better query let me know.
declare
v_ascii varchar2(50);
out_res varchar2(30);
out_str number;
output_str varchar2(30); --employee.person_name%type;
cursor c1 is
select person_name,deptno from employee;
--select '1234'person_name from dual;
begin
--v_ascii varchar2(10);
for rec in c1 
loop
out_res := null;
v_ascii := rec.person_name;
dbms_output.put_line('result are :'||v_ascii);
for i in 1 .. length(rec.person_name)
loop
out_str :=ascii(substr(rec.person_name,i,1));
if out_str between 65 and 98 then
--dbms_output.put_line('letters are:'||' '||substr(rec.person_name,i,1)||' ascii value is: '||out_str);
output_str :=chr(out_str+7);
out_res :=out_res||output_str;
--dbms_output.put_line('result is :'||out_res);
else
out_str :=ascii(substr(rec.person_name,i,1));
if out_str between 48 and 57 then
--dbms_output.put_line('letters are:'||' '||substr(rec.person_name,i,1)||' ascii value is: '||out_str);
output_str :=to_number(out_str mod 10);
out_res :=out_res||output_str;
end if;
end if;
--dbms_output.put_line('result is :'||out_res);
end loop;
dbms_output.put_line('result is :'||out_res);
end loop;
end;


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