Is there any direct syntax for summing two values

Question

Friends,
                   I just have a problem of summing up two or more similar product_id 's  quantities.
for ex:  assume an Internal Table IT_PRODUCT. consider it has two fields one is PRODUCT_ID ( Primary key in Database ) and the other field is QUANTITY.
IT_PRODUCT.
PRODUCT_ID           QUANTITY
I1001SA101                    10
I1001SA101                    20
my desired output is to sum up the similar product_id' s of the internal table and to have only one summed record in the internal Table.
IT_PRODUCT
PRODUCT_ID           QUANTITY
I1001SA101                    30
Is there any direct syntax to do the same or suggest me some more methods.
Pradeep.

Answer 1

Use COLLECT statement..
Check this code...
DATA : BEGIN OF itab OCCURS 0,
matnr LIKE ekpo-matnr,
menge LIKE ekpo-menge,
END OF itab.
DATA : itab2 LIKE itab OCCURS 50 WITH HEADER LINE.
SELECT matnr menge INTO CORRESPONDING FIELDS OF
TABLE itab FROM ekpo UP TO 20 ROWS.
LOOP AT itab.
  COLLECT itab INTO itab2.
ENDLOOP.
Message was edited by:
        Perez C