SQL SERVER 查看数据库里阻塞和死锁情况

  if   exists   (select   *   from   dbo.sysobjects   where   id   =   object_id(N'[dbo].[sp_who_lock]')   and   OBJECTPROPERTY(id,   N'IsProcedure')   =   1)      if   exists   (select   *   from   dbo.sysobj