Transpose Columnwise data to row wise date in 10g

Question

Hi,
How can I transpose the below type of data to
ID     MOTNH      YEAR     Pram1     Param2 Parm2
10000     11     2012 200     300     500
10001     11     2012     700     800 100
to
ID     MONTH     YEAR PARAMETER TARGET     
10000     11     2013     Pram1          200          
10000     11     2013     Pram2          300          
10000     11     2013 Pram3          500          
10001     11     2013 Pram1     700          
10001     11     2013     Pram2     800          
10001     11     2013     Pram3     100
Regards,
Tarun

Answer 1

Basic think in converting column to row is you need to know the number of columns up front. In your case its 3. Now you have to create a dummy table that will have three rows and cross join this with your original table. Then you need to manipulate your data with a DECODE or CASE statement.
below is an example.
with my_table
as
select 10000 id, 11 mth, 2012 yr, 200 prm1, 300 prm2, 500 prm3 from dual union all
select 10001 id, 11 mth, 2012 yr, 700 prm1, 800 prm2, 100 prm3 from dual
), cross_join_table
as
select level no
  from dual
connect by level <= 3 -- This will change based on number of param columns in my_table
select id, mth, yr, decode(no, 1, prm1, 2, prm2, 3, prm3) prm
  from my_table
  cross
  join cross_join_table
order by id, mth, yr, no