unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    DBGrid1: TDBGrid;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
uses unit2;
procedure TForm1.Button1Click(Sender: TObject);
begin
with datamodule2.ClientDataSet1  do
    begin
       close;
       commandtext:='select * from bookinfo';
       open;
    end;
end;

end.