procedure TForm2.N5Click(Sender: TObject);
var
SQLStr:string;
begin
if (opendialog1.Execute) then
SQLStr:='select * into mapinf FROM [excel 8.0;database='+opendialog1.FileName+'].[sheet1$]';
adoconnection2.Connected:=false;
adoconnection2.Execute(SQLStr);
adoconnection2.Connected:=true;
end;错误提示:外部表不是预期的格式。错误出在哪呢?