Need help in logic change to avoid select statement inside loop .

Question

Hello all ,
Please see the below code . Here i got the shipment number in internal table  IT_VTTK . So For this shipment number i want to get the details from Vekp table in to internal table  IT_VEKP  . There is no need for me to use For all entries . I have passed the value of it_vekp into work area wa_vekp and getting the details in to IT_vekp using loop.
But since we should not use the select statement inside the loop , Can anybody please tell me how to achieve this functionality .
Instead of passing into work area wa_vttk if i directly use the internal table I'm getting the following error .
"IT_VTTK" is a table without a header line and therefore has no component called "TKNUM".
Hence i have used select statement inside a loop . Please tell me is there any other way to avoid this ?
types:begin of ty_likp,
        vbeln type likp-vbeln,
       end of ty_likp,
       begin of ty_vttk,
        tknum type vttk-tknum,
        end of ty_vttk.
DATA: IT_VEKP TYPE STANDARD TABLE OF TY_VEKP,
      WA_VEKP TYPE TY_VEKP.
  data:it_likp type standard table of ty_likp,
       wa_likp type ty_likp,
       it_likp1 type standard table of ty_likp,
       it_vttk type standard table of ty_vttk,
       wa_vttk type ty_vttk.
  data:w_tknum type vttk-tknum.
if not it_likp is initial .
    select vbeln
            from
             vbfa
      into table it_vttk
       for all entries in it_likp where vbelv = it_likp-vbeln and vbtyp_n = '8'.
  endif .
IF IT_VTTK[] IS NOT INiTIAL.
    loop at it_vttk into wa_vttk.
    SELECT venum
           EXIDV
           EXIDV2
           BRGEW
           NTGEW
           GEWEI
           TARAG
           GEWEI
           VHART
           INHALT
         FROM VEKP INTO TABLE IT_VEKP where VPOBJKEY = wa_vttk-tknum  and vpobj = '4'.
      endloop.
      endif.

Answer 1

Hello,
Why would you not like to use FOR ALL ENTRIES in the second select? Is it becasue of the length or type mismatch error between the fields VPOBJKEY and wa_vttk-tknum ?
Vikranth