我正在尝试使用table_name周围的以下查询在mySQL中执行一个数据透视图，将事件和设置重新格式化为列：
select
id,
submitted,
case when table_name = 'events' then pulled end as events,
case when table_name = 'settings' then pulled end as settings
from ods.ods_table where name = "time_pulled" and table_name in ("events","settings")
group by id, pulled;
但我得到了这些结果。我如何对它进行分组，以便id 26只获得一行，而id 31也获得一行，例如。在这种情况下，group by似乎没有帮助我。
+----+---------------------+---------------------+---------------------+
| id | submitted | settings | events |
+----+---------------------+---------------------+---------------------+
| 20 | 2015-03-10 09:41:17 | | 2015-03-10 09:41:17 |
| 26 | 2015-03-10 09:39:33 | 2015-03-10 09:39:33 | |
| 26 | 2015-03-10 09:39:34 | | 2015-03-10 09:39:34 |
| 30 | 2014-03-28 16:56:50 | 2014-03-28 16:56:50 | |
| 31 | 2015-03-10 09:42:31 | 2015-03-10 09:42:31 | |
| 31 | 2015-03-10 09:42:32 | | 2015-03-10 09:42:32 |
+----+---------------------+---------------------+---------------------+
如何通过ID将它们分组到一行？谢谢！