所有字段都不会显示在网格视图中

Question

我在mysql中编写了一个查询，如下所示：

   SELECT inquiry_id, event_name,MAX(ValueData1) as ValueData1
  ,MAX(ValueData2) as ValueData2
  ,MAX(ValueData3) as ValueData3
 ,MAX(ValueData4) as ValueData4
FROM
(
  SELECT  inquiry_id,event_id,event_name
  ,CASE WHEN mailer_id = 1 THEN CONCAT( Edition,' - ',sent_on) END AS ValueData1
  ,CASE WHEN mailer_id = 2 THEN CONCAT( Edition,' - ',sent_on) END AS ValueData2
  ,CASE WHEN mailer_id = 3 THEN CONCAT( Edition,' - ',sent_on) END AS ValueData3
 ,CASE WHEN mailer_id = 4 THEN  CONCAT( Edition,' - ',sent_on)  END AS ValueData4

  FROM crm_support_inquiry 
) AS crm_support_inquiry
GROUP BY inquiry_id,event_id,event_name

其输出如下：

当我运行查询并尝试在网格视图中显示数据时，我只在输出中得到两个字段，即inquiry_id和event_name，即前两个字段。剩余字段未显示。什么是要做？我希望在网格视图中显示完整的查询输出。