You will find Material Group in MVKE table which contain material group number.
MVKE - MVGR1
MVKE - MVGR2
MVKE - MVGR3
MVKE - MVGR4
MVKE - MVGR5
Material group number text will stored in different table.
MVKE - MVGR1 value text will stored in TVM1T.
MVKE - MVGR2 value text will stored in TVM2T.
MVKE - MVGR3 value text will stored in TVM3T.
MVKE - MVGR4 value text will stored in TVM4T.
MVKE - MVGR5 value text will stored in TVM5T.
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