What's the best way to collect internal table?

Hi,
I have an internal table, the fields are:
Key1, key2, key3, qty1, qty2, qty3
I want to collect the field "qty3" based on the key fields: "key1 + key2 + key3".
What's the most efficient way to collect the internal table?
Thanks.

Hi Ren,
You can code something like this with COLLECT statement.
DATA: BEGIN OF ITAB OCCURS 0,
        KEY1 TYPE TABLE1-FIELD1,
        KEY2 TYPE TABLE1-FIELD2,
        KEY3 TYPE TABLE1-FIELD3,
        QTY1 TYPE TABLE2-QTY1,
        QTY2 TYPE TABLE2-QTY2,
        QTY3 TYPE TABLE2-QTY3.
DATA: END OF ITAB.
DATA: BEGIN OF ITAB2 OCCURS 0,
        KEY1 TYPE TABLE1-FIELD1,
        KEY2 TYPE TABLE1-FIELD2,
        KEY3 TYPE TABLE1-FIELD3,
        QTY3 TYPE TABLE2-QTY3.
DATA: END OF ITAB2.
SORT ITAB.
LOOP AT ITAB.
MOVE-CORRESPONDING ITAB TO ITAB2.
COLLECT ITAB2.
ENDLOOP.
LOOP AT ITAB2.
WRITE: /01 ITAB2-KEY1, ITAB2-KEY2, ITAB2-KEY3,
             ITAB3-QTY3.
ENDLOOP.
Hope this will help and give an idea.
Regards,
Ferry Lianto
Please reward points if helpful.

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