我给数据窗口对象设置retrieval argument的时候，出现了一个问题：
syntax error or access violation:Function or column reference to 'mingcheng'in the select list must also appear in group by，不知道是怎么回事儿？请高手指教
------解决方案--------------------
'mingcheng'in the select list must also appear in group by
mingcheng这个字段需要放在group by中。