Issue with group by expression when using non-regular columns

Question

Hi all,
Please help me out to find a solution for this issue. In case i need to group the values where one of the columns is not a regular column.
How can i fix the issue? I tried the possibility of using the alias name, from clause query but still could not crack this.
SELECT   td.xml_file.EXTRACT
            ('//ns1:RequestHeader/ns1:GeneralAttributes/ns1:Attribute[ns1:AttrName=''SUBMITTER_ID'']/ns1:AttrValue/text()',
             'xmlns:ns1="http://emdeon.com/ac/ACSchema"'
            ).getstringval (),
         COUNT (1)
    FROM trx_data td
   WHERE td.trx_agn = 'TR8D4148656848660' AND td.call_type_id = 3
GROUP BY td.xml_file.EXTRACT
            ('//ns1:RequestHeader/ns1:GeneralAttributes/ns1:Attribute[ns1:AttrName=''SUBMITTER_ID'']/ns1:AttrValue/text()',
             'xmlns:ns1="http://emdeon.com/ac/ACSchema"'
            ).getstringval ();
Regards    
Swaminathan

Answer 1

May be something like this
SQL> create table test
  2  (
  3    xml_data xmltype
  4  );
Table created.
SQL> insert into test (xml_data)
  2  values
  3  (
  4  '<submitter>
  5  <row>
  6  <submitter_id>1</submitter_id>
  7  <submitter_name>karthick</submitter_name>
  8  </row>
  9  <row>
10  <submitter_id>2</submitter_id>
11  <submitter_name>vimal</submitter_name>
12  </row>
13  </submitter>');
1 row created.
SQL> insert into test (xml_data)
  2  values
  3  (
  4  '<submitter>
  5  <row>
  6  <submitter_id>1</submitter_id>
  7  <submitter_name>karthick</submitter_name>
  8  </row>
  9  <row>
10  <submitter_id>2</submitter_id>
11  <submitter_name>vimal</submitter_name>
12  </row>
13  </submitter>');
1 row created.
SQL> commit;
Commit complete.
SQL> select t1.submitter_id
  2       , t1.submitter_name
  3       , count(*)
  4    from test t
  5       , xmltable
  6         (
  7           '/submitter/row' passing t.xml_data
  8           columns
  9              submitter_id   integer       path 'submitter_id'  ,
10              submitter_name varchar2(20) path 'submitter_name'
11         ) t1
12   group
13      by t1.submitter_id
14       , t1.submitter_name;
SUBMITTER_ID SUBMITTER_NAME         COUNT(*)
           1 karthick                      2
           2 vimal                         2
SQL>