5 months rolling monthly report by fetching data from cache & Database

Question

Scenario: One monthly report would be created each month end which contains one summary tab and other details tabs. Summary tabs will contain the data of all the months summary data (current month and previous months)
Problem:
Current month data have to come directly from database and previous months data come form cache and whole thing will be cached this time so that when we run next month report the data till this month will also come from cache.
Any one please help me ASAP.

Answer 1

What's wrong with F_GET_COMPANY_CODE ?  Below is similar code - try running this and seeing what you get:
report zlocal_jc_t001w.
tables:
  t001k,     "Valuation area
  t001w.     "Plants/Branches
parameters:
  p_bukrs          like t001k-bukrs default '1000'.
select-options:
  s_werks          for t001w-werks.
start-of-selection.
  perform get_data.
*&      Form  get_data
form get_data.
  data:
    begin of gt_t001k occurs 10,
      bukrs             like t001k-bukrs,
      bwkey             like t001k-bwkey,
      werks             like t001w-werks,
    end of gt_t001k.
  select
    t001k~bukrs
    t001k~bwkey
    t001w~werks
    into corresponding fields of table gt_t001k
    from t001k as t001k
    inner join t001w as t001w on t001w~bwkey = t001k~bwkey
    where t001k~bukrs = p_bukrs
    and   t001w~werks in s_werks.
  loop at gt_t001k.
    write: /
      gt_t001k-bukrs,
      gt_t001k-bwkey,
      gt_t001k-werks.
  endloop.
endform.                    "get_data
As for links to locally defined database tables, that will depend on what the keys defined in SE11 are e.g. there will be a primary key plus relationships to other tables (for example "WERKS LIKE YSDA_EXP_PRTLOG-YY_PLANT" indicates YY_PLANT relates to T001W).
Jonathan