Urgent problem: grouping by fields of internal table

Question

Hi friend,
i have a urgent problem and i hope that you can help me out:
i have an internal table containing data, and i sorted it by 3 fields.
now what i want to do is kind of grouping that means that all the lines that are the same should be written into another internal table like this:
A
A
B
B
B
C
D
would give me:
A                       1
A                       1
B                       2
B                       2
B                       2
C                       3
D                       4
How could i do this ( especially avoiding nested loops ? ) Is there a handy trick to do this efficiently ?
thank you, i will give points immediately,
Clemens

Answer 1

Hello,
The field position is important for the fields that are using in the control break statements..Also SORT internal table is required.
http://help.sap.com/saphelp_nw2004s/helpdata/en/fc/eb381a358411d1829f0000e829fbfe/content.htm
DATA: BEGIN OF ITAB OCCURS 0,
MATNR TYPE MATNR,
WERKS TYPE WERKS_D,
VALUE TYPE NETPR,
END OF ITAB.
ITAB-MATNR = 'ABC'.
ITAB-WERKS = '0100'.
ITAB-VALUE = '10.00'.
APPEND ITAB.
ITAB-MATNR = '1ABC'.
ITAB-WERKS = '0100'.
ITAB-VALUE = '10.00'.
APPEND ITAB.
SORT ITAB BY MATNR WERKS.
LOOP AT ITAB.
AT FIRST.
  WRITE : 'AT FIRST'.
ENDAT.
AT NEW MATNR.
  WRITE : 'AT NEW MATERIAL NUMBER'.
ENDAT.
AT END OF MATNR.
  SUM.
  WRITE: / ITAB-MATNR, 'MATERIAL TOTAL - ', ITAB-VALUE.
ENDAT.
AT END OF WERKS.
  SUM.
  WRITE: / ITAB-WERKS, 'PLANT TOTAL - ', ITAB-VALUE.
ENDAT.
AT LAST.
  WRITE : 'AT LAST'.
ENDAT.
ENDLOOP.
Regards,
Deepu.K