Give me some logic for the mentioned select query

Question

hi.
i am writing a select query hereby but seems that it is not logically viable.please give me the best possible,logically correct piece of code.....thnks in adv.
i am using tables to give the output depending on the date.
ranges r_audat for vakpa-audat.
r_audat-sign  = 'I'.
r_audat-option = 'BT'.
r_audat-low = '20060101'.
r_audat-high = '20071231'.
append r_audat.
clear r_audat.
select vbeln kunde vkorg audat
       from vakpa
       into table it_vakpa
       for all entries in it_knb1
       where kunnr = it_knb1-kunnr
       and vkorg = it_tvko-vkorg
       and audat in r_audat.
sort it_vakpa by vkorg.
delete adjacent duplicates from it_vakpa.
sort it_knb1 by kunnr.
loop at it_knb1.
  Read table it_vakpa with key vkorg = it_tvko-vkorg.
  if sy-subrc ne 0.
delete it_knb1 where bukrs = it_knb1-bukrs.
  delete it_knb1.
  endif.
endloop.

Answer 1

Hi,
while looping don't delete the entries from the internal table on which you are looping.
take one more vairable(flag(1) type c) in internal table structure it_knb1.
after read statement
if sy-subrc <> 0.
   it_knb1-flag = 'X'.
   modify it_knb1 transporting flag.
endif.
after endloop, write the delete statement on it_knb1.
delete table it_knb1 where flag = 'X'.
this is the best approach.
Reward if useful.
Thanks,
Sreeram.