How would you perform "collect" on internal table field.
I need the sum of itab-sumvol (for all different other fields). I have problems (and I guess it is not best idea write internal to an SAP Z-table and then perform collect)
Here is how I created itab
select * from likp .
select * from lips where vbeln = likp-vbeln.
itab-matnr = lips-matnr.
itab-prodh = lips-prodh.
itab-sumvol = lips-lfimg * lips-umvkz / lips-umvkn.
itab-lfimg = lips-lfimg.
itab-umvkz = lips-umvkz.
itab-umvkn = lips-umvkn.
itab-volum = lips-volum.
append itab. clear itab.
endselect.
endselect.