全选

方法一：类实现

unit USelectAll;

interface
uses  FDataPool, Data.DB, Data.Win.ADODB, Vcl.Menus,  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ComCtrls,
  Vcl.ExtCtrls, Vcl.DBCtrls, Vcl.Grids, Vcl.DBGrids, Clipbrd,
  Vcl.StdCtrls;
/// <summary>
/// 全选更新所有记录选中值为1
/// </summary>
type TSeleteAll=class
 public
 class procedure selectAllRecord (var sAqry:TADOQuery);
end;
implementation
uses 日常管理助手, UInitializeDatabaseAdoSqlApi;
 class procedure TSeleteAll.selectAllRecord(var sAqry:TADOQuery);
 var
 SBiao: string;
 begin
 SBiao:=copy(sAqry.name,4,length(sAqry.name)-3);
 with sAqry do
 begin
 Close;
 SQL.Text :='UPDATE ' + SBiao + ' SET 选中 = 1';
 ExecSQL;
 end;
     //防止程序假死
 // Application.ProcessMessages;
//  //刷新下显示
// with sAqry do
// begin
// Close;
// SQL.Text :='select * from ' + SBiao ;
// Open;
// end;
TInitializeDatabaseAdoSqlApi.accessAdoToSql(sAqry);
 end;
end.

引用类，所需要用的单元中uses语句里添加该引用类单元名；

procedure TForm3.N8Click(Sender: TObject);

begin
TSeleteAll.selectAllRecord(frmDataPool.qry需要做的事); //全选记录 ，更改选中列为1
end;

方法2：单击事件写法

procedure TForm3.N8Click(Sender: TObject);

 begin
 with frmDataPool.qry需要做的事 do
 begin
 Close;
 SQL.Text :='UPDATE 需要做的事 SET 选中 = 1';
 ExecSQL;
 end;
     //防止程序假死
 // Application.ProcessMessages;
//  //刷新下显示
// with sAqry do
// begin
// Close;
// SQL.Text :='select * from ' + SBiao ;
// Open;
// end;
TInitializeDatabaseAdoSqlApi.accessAdoToSql(frmDataPool.qry需要做的事);
 end;