主题：SQLGroupTableBuilder统计问题,请教老师

Dim bd1 As New SQLGroupTableBuilder("统计表1","明细")
Dim dt1 As fxDataSource
bd1.C
bd1.Groups.AddDef("日期",DateGroupEnum.Year,"日期_年")

bd1.Groups.AddDef("日期","日期_月")

根据以上代码,学生想让"日期_年"列中不生成数据,但列保留该怎么调整

Dim bd1 As New SQLGroupTableBuilder("统计表1","明细")
Dim dt1 As fxDataSource
bd1.C
bd1.Groups.AddExp ("日期_年","IIF(False,"","")")

bd1.Groups.AddDef("日期","日期_月")

方法一：生成以后，清空年列的数据；

方法二：不要用年列，生成统计表以后，动态添加年列。

http://www.foxtable.com/help/topics/1428.htm