How can I achieve following results with a query

Question

Hello everyone,
I have some data like the following sample and I need to convert it or kind of pivot it
No.      P_1     P_2    P_3
1        1       1       5
1        2       3       1 I want above data to look like the following result set:
P_type  No.   P_values
P_1       1      1,2
P_2       1      1,3
P_3       1      5,1The No. column could go as much as upto 10. Thanks in advance.

Answer 1

Something like:
with t1 as (
            select 1 no,1 p_1,1 p_2,5 p_3 from dual union all
            select 1,2,3,1 from dual
     t2 as (
            select  no,
                    ltrim(sys_connect_by_path(p_1,','),',') p1_values,
                    ltrim(sys_connect_by_path(p_2,','),',') p2_values,
                    ltrim(sys_connect_by_path(p_3,','),',') p3_values
              from  (
                     select  t1.*,
                             row_number() over(partition by no order by 1) rn
                       from  t1
              where connect_by_isleaf = 1
              start with rn = 1
              connect by no = prior no
                     and rn = prior rn + 1
select  'P_1' p_type,
         no,
         p1_values p_values
   from  t2
union all
select  'P_2' p_type,
         no,
         p2_values
   from  t2
union all
select  'P_3' p_type,
         no,
         p3_values
   from  t2
order by no,
         p_type
P_T         NO P_VALUES
P_1          1 2,1
P_2          1 3,1
P_3          1 1,5
SQL> SY.