select 'alter system kill session '''||b.SID||','||b.SERIAL#||''''||' immediate;'
from v$session s, v$session b where s.status='ACTIVE' and s.EVENT like 'enq%' 
and s.seconds_in_wait>1
and s.blocking_session=b.sid
order by b.sid, s.sid

declare
begin
    for ss in (
    select b.SID, b.SERIAL#
      from v$session s, v$session b, V$SQL sq
     where s.status = 'ACTIVE'
       and s.EVENT like 'enq%'
       and s.seconds_in_wait > 1
       and s.blocking_session = b.sid
       and s.SQL_ADDRESS=sq.ADDRESS
       and SQL_TEXT like '%--#@$rE3df%^!!%' 
    )
    loop
        execute immediate 'alter system kill session ''' || to_char(ss.sid,'999999')
                                   || ',' ||to_char(ss.serial#,'999999')||'''';
        commit;
    end loop;
end;

unit TPN_Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    ADOConnection1: TADOConnection;
    ADOQuery1: TADOQuery;
    Button2: TButton;
    ADOQuery2: TADOQuery;
    Button3: TButton;
    ADOConnection2: TADOConnection;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  TMyThread = class(TThread)
    private
    { Private declarations }
  protected
    procedure Execute; override;
  end;

var
  Form1: TForm1;
  MyThread: TMyThread;
  i:integer;
  sql_:string;
implementation

{$R *.dfm}



//Поток
procedure TMyThread.Execute;
begin

 Form1.ADOQuery1.ExecSQL;

end;



procedure TForm1.Button1Click(Sender: TObject);
begin

//Создаем экземпляр потока:
MyThread:=TMyThread.Create(False);
//Параметр False запускает поток сразу после создания, True - запуск впоследствии , методом Resume
//Указываем приоритет потока
MyThread.Priority:=tpNormal;


Form1.ADOQuery2.ExecSQL;

end;

end.

//Поток
procedure TMyThread.Execute;
begin
try

//Берем таблицу на апдейт
Form1.ADOQuery1.Active := false;
Form1.ADOQuery1.SQL.Clear;
sql_:='';
sql_:='select * from sys5.dka for update --#@$rE3df%^!!';
Form1.ADOQuery1.SQL.Add(sql_);
Form1.ADOQuery1.Active := True;


//Ошибка
except
   ShowMessage('Ошибка обработки потока!');
   Form1.ADOQuery1.Active:=false;
end;
end;