主题：[求助]表达式列统计报错

Dim b As New SQLGroupTableBuilder("汇总统计","销售订单明细")
b.AddTable("销售订单明细","销售单号","销售订单","销售单号")
b.Groups.AddDef("货物名称")
b.Groups.AddDef("生产厂家")

b.Groups.AddDef("提货机型")
b.Totals.AddDef("数量")
b.Totals.Addexp("金额","单价 * 数量")
b.VerticalTotal = True
b.Build
MainTable = Tables("汇总统计")

帮助有介绍表达式列的处理：

http://www.foxtable.com/help/topics/1626.htm