主题：出现“空”列，是何原因？

因为年或月这一列有空值列，解决办法：

Dim g As New CrossTableBuilder("统计表1", DataTables("合同"))
g.HGroups.AddDef("品号")
g.VGroups.AddDef("年", "{0}年")
g.VGroups.AddDef("月", "{0}月")
g.Totals.AddDef("数量", "数量")
g.FromServer = True

g.Filter = "年 Is Not Null And 月 Is Not Null"
g.Build()
MainTable = Tables("统计表1")