多个联接列
组合统计结果的联接列可以有多个。
假定进货单、销售单、退货单三个表,除了型号列之外,还有一个品名列,需要根据品名和型号分组,统计进货、销售、退货、库存数据,代码为:
Dim
bd1 As
New GroupTableBuilder("统计表1",DataTables("进货单"))
Dim
dt1 As
fxDataSource
bd1.Groups.AddDef("品名")
'根据品名分组
bd1.Groups.AddDef("型号")
'根据型号分组
bd1.Totals.AddDef("数量","进货_数量")
'对数量进行统计
bd1.Totals.AddDef("金额","进货_金额")
'对金额进行统计
dt1 =
bd1.BuildDataSource()
Dim
bd2 As
New GroupTableBuilder("统计表2",DataTables("销售单"))
Dim
dt2 As
fxDataSource
bd2.Groups.AddDef("品名")
'根据品名分组
bd2.Groups.AddDef("型号")
'根据型号分组
bd2.Totals.AddDef("数量","销售_数量")
'对数量进行统计
bd2.Totals.AddDef("金额","销售_金额")
'对金额进行统计
dt2 =
bd2.BuildDataSource()
Dim
bd3 As
New GroupTableBuilder("统计表3",DataTables("退货单"))
Dim dt3
As
fxDataSource
bd3.Groups.AddDef("品名")
'根据品名分组
bd3.Groups.AddDef("型号")
'根据型号分组
bd3.Totals.AddDef("数量","退货_数量")
'对数量进行统计
bd3.Totals.AddDef("金额","退货_金额")
'对金额进行统计
dt3 =
bd3.BuildDataSource()
Dim
nms
As String()
= {"品名","型号"}
'指定连接列
dt1.Combine(nms,dt2,nms)
'将销售统计数据组合到进货统计数据
dt1.Combine(nms,dt3,nms)
'将退货统计数据组合到进货统计数据
dt1.Show("统计表1")
'显示统计结果