Sql to display rows like columns

Question

Hi,
I am having table with 3 columns i.e col1, col2, col3
and the values are :
col1 col2 col3
1 11 A
1 11 B
1 11 C
2 22 P
2 22 Q
2 22 R
2 22 S
I require the output from the above data as follows :
1 11 A B C
2 22 P Q R S
rows of col3 to be converted into column.
Please suggest to get the about output thru SQL.
Thanks
Ramesh

Answer 1

Ok, but you're not gonna like it.... (ignore the bit above the select statment as that is just setting up the test data)
with t as (select 1 as col1, 11 as col2, 'a' as col3 from dual union
           select 1, 11, 'b' from dual union
           select 2, 22, 'j' from dual union
           select 2, 22, 'k' from dual union
           select 2, 22, 'l' from dual union
           select 2, 33, 'v' from dual)
select col1, col2, max(col3_1)||max(col3_2)||max(col3_3)||max(col3_4)||max(col3_5)||max(col3_6)||max(col3_7)||max(col3_8)||max(col3_9)||max(col3_10) col3
from  (
        select col1, col2, decode(row_number() over (partition by col1, col2 order by col1, col2), 1, col3, null) col3_1, null col3_2, null col3_3, null col3_4, null col3_5, null col3_6, null col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, decode(row_number() over (partition by col1, col2 order by col1, col2), 2, col3, null) col3_2, null col3_3, null col3_4, null col3_5, null col3_6, null col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, decode(row_number() over (partition by col1, col2 order by col1, col2), 3, col3, null) col3_3, null col3_4, null col3_5, null col3_6, null col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, decode(row_number() over (partition by col1, col2 order by col1, col2), 4, col3, null) col3_4, null col3_5, null col3_6, null col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, null col3_4, decode(row_number() over (partition by col1, col2 order by col1, col2), 5, col3, null) col3_5, null col3_6, null col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, null col3_4, null col3_5, decode(row_number() over (partition by col1, col2 order by col1, col2), 6, col3, null) col3_6, null col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, null col3_4, null col3_5, null col3_6, decode(row_number() over (partition by col1, col2 order by col1, col2), 7, col3, null) col3_7, null col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, null col3_4, null col3_5, null col3_6, null col3_7, decode(row_number() over (partition by col1, col2 order by col1, col2), 8, col3, null) col3_8, null col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, null col3_4, null col3_5, null col3_6, null col3_7, null col3_8, decode(row_number() over (partition by col1, col2 order by col1, col2), 9, col3, null) col3_9, null col3_10 from t union
        select col1, col2, null col3_1, null col3_2, null col3_3, null col3_4, null col3_5, null col3_6, null col3_7, null col3_8, null col3_9, decode(row_number() over (partition by col1, col2 order by col1, col2), 10, col3, null) col3_10 from t
      ) t
group by col1, col2
      COL1       COL2 COL3
         2         33 v
         1         11 ab
         2         22 jkl
SQL>