Group without using code_combination_id

Question

Hi, 1st post... been working on a query all day to pull back all balances and 3 segments of the code combination in Oracle GL. This itself is fine but the user also wants the number of journal transactions appended on the end for each the segments 1/2/4 so I join to headers and lines via code_combination_id and this is where the problem occurs... I need one line for each of the 3 segments but by joining on code combination I can't do a group by on code combination as that field in effect splits the data by all of the accounting flexfield. code is below, anyone have any ideas? Many thanks.
SELECT gcc.segment1 LEGAL_ENTITY,
  gcc.segment2 BUSINESS_UNIT,
       gcc.segment4 ACCOUNT,
  fl.description ACCOUNT_NAME,
       b.currency_code CCY1CODE,
       sum((B.BEGIN_BALANCE_DR - B.BEGIN_BALANCE_CR)+ (B.PERIOD_NET_DR - B.PERIOD_NET_CR))   CCY1GLENDBALANCE,
      -- b.begin_balance_dr,
      -- b.begin_balance_cr,
       'GBP' AS CCY2CODE,
       0 AS CCY2GLENDBALANCE,
       b.period_num Period,
       b.period_year Year,
      sum( b.period_net_dr) CCY1NETDEBITS,
       sum(b.period_net_cr) CCY1NETCREDITS
,(select count(*)
       from GL_JE_HEADERS JEH
       where je_header_id in (select je_header_id from gl_je_lines JEL where jel.code_combination_id = b.code_combination_id)
       and JEH.je_source in ('Spreadsheet', 'Manual') and jeh.period_name ='OCT-13'
       ) CCY1TRANSCOUNT
  FROM GL_Balances B, GL_Code_combinations GCC, fnd_flex_values_vl FL,
  (select gll.ledger_id, gll.name, gll.currency_code
from gl_ledgers gll, gl_ledger_set_norm_assign_v glln
where gll.ledger_id = glln.ledger_id
and glln.ledger_set_id = 2141
and glln.ledger_id != 2022) ledgers
WHERE b.code_combination_id = gcc.code_combination_id
AND PERIOD_NUM = 10
AND PERIOD_YEAR = 2013
AND GCC.SEGMENT1 = '6199'
AND GCC.segment4 = 719100
AND FL.flex_value = GCC.segment4
AND FL.flex_value_set_id = 1014890
AND GCC.SEGMENT2 in (/*1521, 1119, */ 1115)
and b.ledger_id = ledgers.ledger_id
and b.currency_code = ledgers.currency_code
--and b.code_combination_id IN (218280, 216238)
GROUP BY GCC.SEGMENT4,GCC.SEGMENT1, GCC.SEGMENT2, fl.description, b.currency_code, b.period_num, b.period_year, b.code_combination_id
order by GCC.segment2

Answer 1

Take a look at the FAQ or wherever those rules are stated or get an idea from reading other threads.
with testdata as (
select 1 first_column, 'A' second_column from dual
union all
expected output is
Col1, Col2
A, 1