主题：SQLGroupTableBuilder公式列问题

Dim b As New SQLGroupTableBuilder("统计表1","表A")
B.AddTable("表A","编码","表B","编码")
B.Groups.AddDef("公司")
B.Totals.AddDef("数据1")
B.Totals.ADDDEF("数据2")
B.Totals.AddDef("数据3")
B.Totals.AddDef("数据4")
b.Totals.AddDef("数据5","iif(数据1 Is Null,0, 数据1) + iif(数据2 Is Null,0, 数据2) + iif(数据3 Is Null,0, 数据3) + iif(数据4 Is Null,0, 数据4)")
B.Build