How to get the desired output in the format ...?

Question

Hi all,
I am having data like this.
Col1 col2 col3
1 2 1
1 2 2
1 2 3
2 3 7
2 3 8
2 3 9
I want to output the data like this
1 2 1,2,3
2 3 7,8,9
How to get this.
Thanks in advance,
Pal

Answer 1

In simple sql...
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> select * from t
  2  /
      COL1       COL2       COL3
         1          2          1
         1          2          2
         1          2          3
         2          3          7
         2          3          8
         2          3          9
6 rows selected.
SQL> select max(decode(rno,1,to_number(col1||col2||col3))) col1, max(decode(rno,2,col3)) col2, max(decode(rno,3,col3)) col3
  2    from (select row_number() over(partition by col1,col2 order by col3) rno, t.*
  3           from t)
  4  group by col1
  5  /
      COL1       COL2       COL3
       121          2          3
       237          8          9
SQL>Thanks,
Karthick.