主题：[求助]怎样为查询表增加有条件的统计列？

QueryBuilder生成的表，也可以动态增加列的哦，例如：

Dim q As new QueryBuilder
q.TableName = "销售"
q.SelectString = "Select * from {订单}"
q.Build()
DataTables("销售").DataCols.Add("金额", Gettype(Double), "[数量] * [单价] * (1 - [折扣])")
MainTable = Tables("销售")