Reporting services 带IIF条件的SSRS求和表达式

我的代码应该是总和，但它给了我不正确的结果

=SUM(IIF(Fields!BusinessDriver.Value = "Business Risk Reduction", 
Fields!BRRCalcRRPVETC.Value, IIF(Fields!BusinessDriver.Value = "Major 
Growth" OR Fields!BusinessDriver.Value = "Contractual Growth" OR 
Fields!BusinessDriver.Value = "Growth Improvement" OR 
Fields!BusinessDriver.Value = "Sustenance Efficiency", 
Fields!NPVonETC.Value, NOTHING))). 

我做错什么了吗？ 该代码位于我的总计字段中

尝试改用

开关（）

=sum(switch(Fields!BusinessDriver.Value = "Business Risk Reduction", Fields!BRRCalcRRPVETC.Value, Fields!BusinessDriver.Value = "Major Growth", Fields!NPVonETC.Value, Fields!BusinessDriver.Value = "Contractual Growth", Fields!NPVonETC.Value, Fields!BusinessDriver.Value = "Growth Improvement", Fields!NPVonETC.Value, Fields!BusinessDriver.Value = "Sustenance Efficiency", Fields!NPVonETC.Value, 1=1, 0))

有关更多信息，请参见此处：
请提供您的报告样本，显示当前输出和预期输出。我已附上2个样本。一个是我的表格，另一个是已导出到excel的结果集。有数千行，但为了抓取屏幕，我删除了它们。基本上，当我对第二列进行合计时，（我在excel中再次检查以确保其合计），但其合计结果与@niktrs下面的合计行不相同