Transpose columns into rows-Please Help

Question

Hi,
I have a table(test_data) in following format:
F_P            reference_id  first_nm  last_nm
EM_NULL                   0         0        0
EM_NOT_NULL               0         0        0
DM_NULL                    1296       145     1689
DM_NOT_NULL               0         0        0I need to transpose the the above table as :
Column_Name   EM_NULL EM_NOT_null DM_null DM_not_null
Reference_ID        0             0    1296           0
first_nm            0             0     145           0
last_nm                 0             0    1689           0I tried below code but unable to get the first column values as reference_id,first_nm,last_nm although I was successful in getting the other column values.Below is the code:
With
  lines as (select level line from dual connect by level <= 3),
    cols as (select level col from dual connect  by level <= 3)
    select
    max(decode(col, 1,
                      decode(line, 1, to_number('REFERENCE_ID') ,
                                   2, to_number('FIRST_NM'),
                                   3, to_number('LAST_NM')
                                   )))column_name,
    max(decode(col, 2,
                      decode(line, 1, REFERENCE_ID,
                                   2, FIRST_NM,
                                   3, LAST_NM
                                   )))EM_NULL,
         max(decode(col, 3,
                     decode(line, 1, REFERENCE_ID,
                                   2, FIRST_NM,
                                   3, LAST_NM
                                   )))EM_NOT_NULL,
          max(decode(col, 4,
                     decode(line, 1, REFERENCE_ID,
                                  2, FIRST_NM,
                                   3, LAST_NM
                                   )))DM_NULL,
          max(decode(col, 5,
                     decode(line, 1, REFERENCE_ID,
                                   2, FIRST_NM,
                                   3, LAST_NM
                                   )))DM_NULL
   from lines, cols,
        (select rownum rn, TEST_DATA.* from Test_Data)
   where rn = col
   group by line
   order by lineBut since my 1st column values are character its not allowing me the group by function.
Edited by: BluShadow on 23-Sep-2011 08:31
formatted and added {noformat}{noformat} tags.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

I think you want something like this...
SQL> ed
Wrote file afiedt.buf
  1  with test_data as (select 'EM_NULL' as f_p, 0 as reference_id, 0 as first_nm, 0 as last_nm from dual union all
  2                     select 'EM_NOT_NULL', 0, 0, 0 from dual union all
  3                     select 'DM_NULL', 1296, 145, 1689 from dual union all
  4                     select 'DM_NOT_NULL', 0, 0, 0 from dual)
  5  --
  6  -- end of test data
  7  --
  8  select decode(rn,1,'Reference_ID',2,'first_nm',3,'last_nm') as Column_name
  9        ,max(decode(f_p,'EM_NULL',decode(rn,1,reference_id,2,first_nm,3,last_nm))) as EM_NULL
10        ,max(decode(f_p,'EM_NOT_NULL',decode(rn,1,reference_id,2,first_nm,3,last_nm))) as EM_NOT_NULL
11        ,max(decode(f_p,'DM_NULL',decode(rn,1,reference_id,2,first_nm,3,last_nm))) as DM_NULL
12        ,max(decode(f_p,'DM_NOT_NULL',decode(rn,1,reference_id,2,first_nm,3,last_nm))) as DM_NOT_NULL
13  from test_data, (select rownum rn from dual connect by rownum <= 3)
14  group by decode(rn,1,'Reference_ID',2,'first_nm',3,'last_nm')
15* order by decode(Column_name,'Reference_ID',1,'first_nm',2,3)
SQL> /
COLUMN_NAME     EM_NULL EM_NOT_NULL    DM_NULL DM_NOT_NULL
Reference_ID          0           0       1296           0
first_nm              0           0        145           0
last_nm               0           0       1689           0Unless you're using 11g and then you could look at the new PIVOT/UNPIVOT keywords