SQL> var v_str varchar2(100);
SQL> exec :v_str:=',id1,id11,id101,';
PL/SQL procedure successfully completed.
SQL> select :v_str a,replace(:v_str,',','') b
2 ,substr(:v_str,instr(:v_str,',',1,rownum)+1,
3 instr(:v_str,',',1,rownum+1)-instr(:v_str,',',1,rownum)-1) c
4 from dual
5 connect by rownum<length(:v_str)-length(replace(:v_str,',',''));
A B C
-------------------------------- -------------------------------- --------------------------------
,id1,id11,id101, id1id11id101 id1
,id1,id11,id101, id1id11id101 id11
,id1,id11,id101, id1id11id101 id101
