what are the layers of data description in r/3?

Answer Posted / naresh

LAYERS OF DATA DESCRIPTION IN R/3 ARE 3 TYPES.

1. EXTERNAL LAYER.

2. ABAP/4 LAYER.

3. DATABASE LAYER.

EXTERNAL LAYER:- FOR USER PURPOSE FOR INTERACTING DATA.

ABAP/4 LAYER:- DESCRIBES THE DATA FORMATS USED BY THE ABAP/4
PROCESSOR.

DATABASE LAYER:- DESCRIBES THE DATA FORMATS USED IN THE
DATABASE.

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