Oracle Pivot query regardless of number of columns

Question

Hi, I have a requirement to create a view by pivoting all records associated with primary record regardless of the number of records, but... the LEVELID marked as Primary must be the first column left to right. The order of columns left to right after that do not matter.
There can be up to 18 CODES associated with a CLM but the amount is variable.
Thank you for your time.
create table
id_levels
(clm varchar2(12),
code varchar2 (12),
levelid varchar2 (12));
insert into id_levels select '1','15','Primary' from dual;
insert into id_levels select '1','42','Secondary' from dual;
insert into id_levels select '1','44','Third' from dual;
insert into id_levels select '1','41','Secondary' from dual;
insert into id_levels select '2','3','Primary' from dual;
insert into id_levels select '2','4','Secondary' from dual;
insert into id_levels select '3','24','Primary' from dual;
insert into id_levels select '3','15','Secondary' from dual;
insert into id_levels select '3','15','Secondary' from dual;
insert into id_levels select '3','16','Third' from dual;
insert into id_levels select '4','12','Primary' from dual;
insert into id_levels select '4','67','Third' from dual;
insert into id_levels select '5','13','Primary' from dual;
insert into id_levels select '5','24','Secondary' from dual;
insert into id_levels select '5','22','Secondary' from dual;I need the following:
clm | code1 | code2 | code3 | code4 | code5 | code6 | code7 | code8 | code9 | code10
1 | 15 | 42 | 44 | 41
2 | 3 | 4
3 | 24 | 15 | 15 | 16
4 | 12 | 67 |
5 | 13 | 24 | 22

Answer 1

There can be up to 18 CODES associated with a CLM but the amount is variable.So, when '18 codes' can be considered as fixed, then you can:
SQL> select * from v$version where rownum=1;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
1 row selected.
SQL> select clm
  2  ,      max(case when rn = 1 then cd end) code1
  3  ,      max(case when rn = 2 then cd end) code2
  4  ,      max(case when rn = 3 then cd end) code3
  5  ,      max(case when rn = 4 then cd end) code4
  6  ,      max(case when rn = 5 then cd end) code5
  7  ,      max(case when rn = 6 then cd end) code6
  8  ,      max(case when rn = 7 then cd end) code7
  9  ,      max(case when rn = 8 then cd end) code8
10  ,      max(case when rn = 9 then cd end) code9
11  ,      max(case when rn = 10 then cd end) code10
12  ,      max(case when rn = 11 then cd end) code11
13  ,      max(case when rn = 12 then cd end) code12
14  ,      max(case when rn = 13 then cd end) code13
15  ,      max(case when rn = 14 then cd end) code14
16  ,      max(case when rn = 15 then cd end) code15
17  ,      max(case when rn = 16 then cd end) code16
18  ,      max(case when rn = 17 then cd end) code17
19  ,      max(case when rn = 18 then cd end) code18
20  from (
21  select t.clm
22  ,      t.code cd
23  ,      t.levelid
24  ,      row_number() over (partition by clm order by case when levelid = 'Primary' then 1 else t
o_number(code) end) rn
25  from   id_levels t
26       )
27  group by clm
28  order by clm;
CLM          CODE1        CODE2        CODE3        CODE4        CODE5        CODE6        CODE7        CODE8        CODE9     
1            15           41           42           44
2            3            4
3            24           15           15           16
4            12           67
5            13           22           24
5 rows selected.
SQL> set lines 50
SQL> /
CLM          CODE1        CODE2
CODE3        CODE4        CODE5
CODE6        CODE7        CODE8
CODE9        CODE10       CODE11
CODE12       CODE13       CODE14
CODE15       CODE16       CODE17
CODE18
CLM          CODE1        CODE2
CODE3        CODE4        CODE5
CODE6        CODE7        CODE8
CODE9        CODE10       CODE11
CODE12       CODE13       CODE14
CODE15       CODE16       CODE17
CODE18
5 rows selected.
SQL>