此外,你要掌握表达式的基本语法:
http://www.foxtable.com/help/topics/0102.htm
http://www.foxtable.com/help/topics/1647.htm
还要知道合成表达式:
http://www.foxtable.com/help/topics/1284.htm
Dim Total As LongTotal = DataTables("订单").Compute("Sum(数量)", "产品 = 'PD01' And 日期 >= #1/1/2015# And 日期 <= #1/31/2015#")Output.Show(Total)