在msaccess报告中使用IIF

Question

I currently have this formula in my report

=(Sum([Final]*[Units]))/Sum([Units]))

Final - Mostly Integer but has the NG mixed in the records Units - Integer Re-Exam - Contains Integer

Now, with my current formula, if [Final] encounters the value NG, the report gives an error, I want to determine the if the value of [Final] is NG, [Re-Exam] will be checked if it contains a value else 0 will be added to the Sum[Final] and if [Re-Exam] contains a value, [Re-Exam]*[Units] will be added to Sum[Final]

the final result displays the result in general number format

I am thinking of using IIF but can't generate the correct formula at the moment and that's what i need to fix

Answer 1

尝试使用Val为非数字字符串返回0：

=Sum(IIf(Val([Final])=0,Val([Re-Exam]),Val([Final]))*[Units])/Sum([Units])