query.pas

《delphi数据库设计与实例开发》随书光盘

unit Query;

interface

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

type
  TForm1 = class(TForm)
    Query1: TQuery;
    DBGrid1: TDBGrid;
    DataSource1: TDataSource;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
 with Query1 do
  begin
   Close;
   DatabaseName:='DBDEMOS';
   SQL.Clear;
   SQL.Add('select LastName,FirstName,HireDate,Salary from employee');
   Prepare;
   Open;
  end;
end;

end.