code: @Deprecated
      public static long queryCount(Dao dao, String sql) {
          String tmpTable = "as _nutz_tmp";
          if (dao.meta().isDB2())
              tmpTable = "as nutz_tmp_" + R.UU32();
          else if (dao.meta().isOracle())
              tmpTable = "";
          else
              tmpTable += "_" + R.UU32();
          Sql sql2 = Sqls.fetchLong("select count(1) from (" + sql + ")" + tmpTable);
          dao.execute(sql2);
          return sql2.getLong();
      }
docs: 查询某sql的结果条数. 请使用Sql接口的版本