Query Results pl sql

Question

I am having a problem in appending various coulomns into one row. I will explain by illustrating an example.
Suppose I have a table "student." I have used dots to separate the fields.
St_id st_no st_sub
1........1........A
2........1........B
3........1........C
4........2........A
5........2........B
I want the output in the following format -
St_id....st_no... st_sub
1,2,3.......1........A,B,C
4,5.........2........A,B
Please let me know how to code this and obtain an output for the same. Thanks a bunch in advance

Answer 1

Found this on:
http://asktom.oracle.com/pls/asktom/f?p=100:11:2119231749211243::::P11_QUESTION_ID:229614022562
So: You'd need to create your own function here.
I must say that I'm truly amazed how Tom solved this almost 10 years ago (never stumbled on that link before), incredible!
Only change I made to the original example from Tom was having your separator as a parameter (default value = a comma) instead of hardcoding it.
So: this should work for you on 8i:
MHO%xe> create table student as ( --generating sample data:
  2  select 1 st_id, 1 st_no, 'A' st_sub from dual union all
  3  select 2,1,'B' from dual union all
  4  select 3,1,'C' from dual union all
  5  select 4,2,'A' from dual union all
  6  select 5,2,'B' from dual
  7  );
Tabel is aangemaakt.
MHO%xe> select * from student
  2  /
     ST_ID ST_NO ST_SUB
         1     1 A
         2     1 B
         3     1 C
         4     2 A
         5     2 B
MHO%xe> create or replace
  2  function transpose( p_key_name in varchar2,
  3                      p_key_val  in varchar2,
  4                      p_other_col_name in varchar2,
  5                      p_tname     in varchar2,
  6                      p_sep       in varchar2 default ','
  7                    )
  8  return varchar2
  9  as
10      type rc is ref cursor;
11      l_str    varchar2(4000);
12      l_sep    varchar2(1) := p_sep;
13      l_val    varchar2(4000);
14 
15      l_cur    rc;
16  begin
17 
18      open l_cur for 'select '||p_other_col_name||'
19                        from '|| p_tname || '
20                       where ' || p_key_name || ' = :x '
21                  using p_key_val;
22 
23      loop
24          fetch l_cur into l_val;
25          exit when l_cur%notfound;
26          l_str := l_str || l_sep || l_val;
27      end loop;
28      close l_cur;
29 
30      return ltrim(l_str, l_sep);
31  end;
32  /
Functie is aangemaakt.
MHO%xe> select transpose( 'st_no', st_no, 'st_id', 'student' ) st_id
  2  ,      t.st_no
  3  ,      transpose( 'st_no', st_no, 'st_sub', 'student' ) st_sub
  4  from   student t
  5  group by t.st_no;
ST_ID           ST_NO ST_SUB
1,2,3               1 A,B,C
4,5                 2 A,BBut you really should want to upgrade to a more recent (and supported) DB-version, it will make your life better ;)