Please help to rewrite this logic to improve the performance.

Question

Hi Experts,
In this procedure we are inserting data into the same table
using same columns and same values with different WHERE conditions.
IN the WHERE clause we have some common conditions in all select statements.
  Thanks.

Answer 1

This should be a start. You can combine all your INSERT statements into a single statement like this
insert into revenue_list
   stat_id
, dit_id
, stat_type
, stat_loc
, stat_cat
select v_wk
     , key_id
     , 'C' stat_type
     , case when trim(sou_loc) = 'AUSTRALIA' then sou_region
            else sou_country
       end  sou_country
     , sou_category
  from source_order
where key_id = p_key_id
   and (
                 sou_loc= 'INDIA'
             and crnt = 5
             and
                lupdate_date is null
                or
                       lupdate_date is not null
                   and status in ('PENDING','COMPLETED')
          or
             qo_doctype ='AUSTRALIA'
   and (
             trunc(sysdate) - trunc(s_timestamp)) = 0
          or
                 trunc(sysdate) - trunc(s_timestamp) > 0
             and trunc(sysdate) - trunc(s_timestamp) < v_wk
          or
                 v_wk = 1
             and v_cmpt_lwk = 1
             and trunc(sysdate) - trunc(s_timestamp) >= v_wk
             and trunc(sysdate) - trunc(s_timestamp) < (7 + v_wk)