unit cxGridDBTableView;
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type
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  TcxGridDBColumn = class(TcxGridColumn)
...
  published
    property DataBinding: TcxGridItemDBDataBinding read GetDataBinding write SetDataBinding;
  end;
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  TcxGridDBTableView = class(TcxGridTableView)
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  public
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    property Columns[Index: Integer]: TcxGridDBColumn read GetColumn write SetColumn;
...
  end;

unit cxGridDBDataDefinitions;
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type
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  TcxGridItemDBDataBinding = class(TcxGridItemDataBinding)
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  public
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    property Field: TField read GetField;
...
  end;