Need help to pivot the data with hierarchy

Question

Dear Team,
I have hierarchical data in the table as shown below
SQL> Create Table t As
  2  (
  3  Select 97250528 col1, 'TSD' col2,  97250528 col3,   'WAV' col4 From dual Union All
  4   Select 75020160     , 'ASD'     ,  97250528     ,   'TSD'      From dual Union All
  5   Select 69150832     , 'PA'      ,  75020160     ,   'ASD'      From dual Union All
  6   Select 49150538     , 'DB'      ,  69150832     ,   'PA'       From dual Union All
  7   Select 49150538     , 'WAV'     ,  49150538     ,   'DB'       From dual Union All
  8   ------------
  9   Select 97251520 col1, 'TSD' col2,  97251520 col3,   'WAV' col4 From dual Union All
10   Select 75020689     , 'ASD'     ,  97251520     ,   'TSD'      From dual Union All
11   Select 69151039     , 'PA'      ,  75020689     ,   'ASD'      From dual Union All
12   Select 49150672     , 'DB'      ,  69151039     ,   'PA'       From dual Union All
13   Select 49150672     , 'WAV'     ,  49150672     ,   'DB'       From dual
14  );
Table created
SQL> select *
  2  from t;
      COL1 COL2       COL3 COL4
  97250528 TSD    97250528 WAV
  75020160 ASD    97250528 TSD
  69150832 PA     75020160 ASD
  49150538 DB     69150832 PA
  49150538 WAV    49150538 DB
  97251520 TSD    97251520 WAV
  75020689 ASD    97251520 TSD
  69151039 PA     75020689 ASD
  49150672 DB     69151039 PA
  49150672 WAV    49150672 DB
10 rows selected
I am using connect by prior clause to get the data in correct order.
below is the SQL i am using..
SQL> Select Level lvl,
  2          col3,
  3          col4
  4   From t
  5   Start With col3 In ('97250528','97251520')
  6   And        col4 In ('WAV')
  7   connect by Nocycle Prior col1 = col3
  8              And     Prior col2 = col4;
       LVL       COL3 COL4
         1   97250528 WAV
         2   97250528 TSD
         3   75020160 ASD
         4   69150832 PA
         5   49150538 DB
         1   97251520 WAV
         2   97251520 TSD
         3   75020689 ASD
         4   69151039 PA
         5   49150672 DB
10 rows selected
The data i am getting is correct one. However i want output in the following format..
     WAV             TSD              ASD             PA             DB
1     97250528     97250528     75020160     69150832     49150538
2     97251520     97251520     75020689     69151039     49150672
When i use max + case statement i am getting in-correct results as there is no group by key
Kindly give me some hints or tips to pivot the data or should i go to PL/SQL to pivot the data.
Regards
nic

Answer 1

Hi Dbb,
Connect_by_root did the trick i guess
Select max(Case When col4 = 'WAV' Then col3 End) wav,
       max(Case When col4 = 'TSD' Then col3 End) tsd,
       max(Case When col4 = 'ASD' Then col3 End) ASD
From
Select  CONNECT_BY_ROOT col1 col,
        col3,
        col4
From t
Start With col3 In ('97250528','97251520')
And        col4 In ('WAV')
connect by Nocycle Prior col1 = col3
            And     Prior col2 = col4
Group By col;    
       WAV        TSD        ASD
  97250528   97250528   75020160
  97251520   97251520   75020689
Let me execute this over bulk-sets of data...
thanks for this pointer and hint..