declare
v_str varchar2(200) := 'abd,324,u78,23f,sd09,2345,dsaf,9079'; 
type str_table_type is table of varchar2(50);
strArr str_table_type := str_table_type('');
v_index integer := 1;
begin
while (length(v_str)-length(replace(v_str,',',''))) > 0 loop
strArr(v_index) := substr(v_str,1,instr(v_str,',',1,1)-1);
v_str := substr(v_str,instr(v_str,',',1,1)+1);
strArr.extend;
v_index := v_index + 1;
end loop;
strArr(v_index) := v_str;
for i in strArr.first..strArr.last loop
dbms_output.put_line(strArr(i));
end loop;
end;