IF语句返回false而没有数据

Question

我正在研究一个细长的IF语句，根据零件号的开头产生不同的输出，例如： 3XXXXXXX = Software，4XXXXXXX = Hardware。

我遇到的问题是，当部件编号尚未提供给行时，公式会输出FALSE。

=IF(B2>0,IF(LEFT(D2,1)="1","Assembly",IF(LEFT(D2,1)="2","Sub-Assembly",IF(LEFT(D2,1)="3","Software",IF(LEFT(D2,1)="4","Hardware",IF(LEFT(D2,1)="5","Chemical",IF(LEFT(D2,1)="6","Spare",IF(LEFT(D2,1)="7","Spare",IF(LEFT(D2,1)="8","Document",IF(LEFT(D2,1)="9","Misc",""))))))))))

如果你能找到我错的地方，请告诉我！

Answer 1

您至少还有两个其他选项，它们都为您提供了更好的可维护代码。

如果您使用Excel 2016或更高版本，则有SWITCH功能。您的公式将更具可读性：

=IF(B2>0,SWITCH(LEFT(D2,1),"1","Assembly","2","Sub-Assembly","3","Software","4","Hardware","5","Chemical","6","Spare","7","Spare","8","Document","9","Misc",""))

即使在早期的Excel版本中，您也可以使用查找表，它为您提供了更高的通用性。创建一个类别表，您可以将它们放在单独的表Categories：

中

使用VLOOKUP功能与IFERROR一起提供未找到时的默认值：

=IFERROR(VLOOKUP(LEFT(D2,1),Categories!$A$1:$B$9,2,FALSE),"")

Answer 2

您没有为第一个大条件设置任何值（如果B2不是> 0）

请改为尝试：

=IF(B2>0,IF(LEFT(D2,1)="1","Assembly",IF(LEFT(D2,1)="2","Sub-Assembly",IF(LEFT(D2,1)="3","Software",IF(LEFT(D2,1)="4","Hardware",IF(LEFT(D2,1)="5","Chemical",IF(LEFT(D2,1)="6","Spare",IF(LEFT(D2,1)="7","Spare",IF(LEFT(D2,1)="8","Document",IF(LEFT(D2,1)="9","Misc",""))))))))),"")

Answer 3

您可以像这样简化公式：

=IF(B2<=0,"",CHOOSE(LEFT(D2,1),"Assembly","Sub-Assembly","Software","Hardware",
  "Chemical","Spare","Spare","Document","Misc"))