📄 unit3.pas
字号:
unit Unit3;
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;
Start: TButton;
Edit1: TEdit;
Label1: TLabel;
procedure StartClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.StartClick(Sender: TObject);
begin
Query1.Close;
Query1.SQL.Clear;
Query1.SQL.Add('SELECT 学号');
Query1.SQL.Add('FROM classmates');
Query1.SQL.Add('WHERE 年龄<:number');
Query1.Params[0].AsString:=Edit1.Text;
Query1.Prepare;
Query1.Open;
end;
end.
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