Display a column as row with same row names.

Question

Hi,
My belwo query displaying o/p in this format.I need to conver a row with appriate colmn value (see the required o/p).
could some help.
current o/p
TEST_SESSION_ID       ROSTER_DOMAIN_NAME             TO_CHAR(A.SCORE)     SEM
4087               AR - Integers and Fractions     5.148757270620481     1
4087               AR - Decimal Numbers            5.5597596042656825     2required o/p format
TEST_SESSION_ID          AR - Integers and Fractions  AR - Decimal Numbers    sem-AR -                    sem
                                                                          Integers and Fractions    AR - Decimal Numbers
4087                  5.148757270620481             5.5597596042656825           1                   2ROSTER_DOMAIN_NAME are not staticks.I tcould be increase .some times it could have 20 names.Since i can t use decode or case with statically .can some one help on this.
query
SELECT a.test_session_id,c.roster_domain_name,to_char(a.score),a.sem FROM
      test_session_detail a,test_session b ,test_detail c
      WHERE a.test_session_id = b.test_session_id
      AND c.test_detail_id = a.test_detail_id
      AND exists (
      select td.test_detail_id
      from test_detail td
      where domain_map_id is not  null
      and c.test_detail_id =td.test_detail_id
      and domain_map_id in('303','306','305','304'))
      AND b.test_session_id in ('4087')
      AND domain_group_id NOT IN (
      SELECT domain_group_id
      FROM test_session_detail a,test_session b
      WHERE a.test_session_id = b.test_session_id
      AND a.domain_group_id is not null
      AND b.test_session_status_id = 4
      AND a.test_session_status_id <> 3
      AND b.test_session_id IN ('4087'))

Answer 1

Ok, the problem here is that you want a dynamic pivot of data and you also want to use some of the data as the column names.
SQL requires that the columns to be retrieved are known at query parse time, i.e. before any data is fetched, so it's not easily possible to have dynamic column names done in a single query.
The general steps in executing a query are...
1. Submit SQL query (Open Query)
2. SQL Query Parsed
3. SQL Query Executed
4. Row Fetched
5. Repeat step 4 until no more rows
6. Close QuerySo, as you can see no data is fetched until step 4, but, at Step 2, the SQL engine needs to have parsed the query and already know what columns and data types are going to be returned.
An example of how something similar can be achieved is given on this thread:
How to pipeline a function with a dynamic number of columns?
But that may be a little too complex to implement.
What you are really wanting is something at the front end reporting side of things.
Ideally, this is the task of a reporting tool, not of the SQL engine which is retrieving the data.