Ms access 正在尝试将IIF合并到Select语句中

试图在从MS Access SQL语句中选择数据时合并IIF

如果一个数据库中每个人都有两个地址，并且有一个键指示要使用哪个地址，那么如何告诉SQL语句基于该键使用地址1或地址2？这是为了创建可在报表中使用的查询

我已经试过了，但它在第一个IIF时抛出了一个错误：

SELECT MAILINGTABLE.MailAutoNumber, MAILINGTABLE.MailLastName, MAILINGTABLE.MailFirstName, 
  IIF(MailNewsletter1or2=1) MAILINGTABLE.MailAddr1 as AD1, 
  IIF(MailNewsletter1or2=1) MAILINGTABLE.MailAddr2 as AD2, 
  IIF(MailNewsletter1or2=1) MAILINGTABLE.MailCity as city, 
  IIF(MailNewsletter1or2=1) MAILINGTABLE.MailState as State, 
  IIF(MailNewsletter1or2=1 MAILINGTABLE.MailZip as Zip, 
  IIF(MailNewsletter1or2=2) MAILINGTABLE.Addr2Addr1 as AD1,
  IIF(MailNewsletter1or2=2) MAILINGTABLE.Addr2Addr2 as AD2, 
  IIF(MailNewsletter1or2=2) MAILINGTABLE.Addr2City as City, 
  IIF(MailNewsletter1or2=2) MAILINGTABLE.Addr2State as State, 
  IIF(MailNewsletter1or2=2) MAILINGTABLE.Addr2Zip as Zip, 
  MAILINGTABLE.MailSalutation, MAILINGTABLE.[232HelpFundraiser], 
  MAILINGTABLE.InformalSalutation, MAILINGTABLE.[232HelpFundraiser1or2]
FROM MAILINGTABLE
WHERE (((MAILINGTABLE.[232HelpFundraiser])=Yes))
ORDER BY MAILINGTABLE.MailLastName, MAILINGTABLE.MailFirstName;

IIf（）语法完全错误。应该是这样的：

IIf（此条件为真，使用此字段，否则使用其他字段）

如果要单独确定每个地址行，则需要其中5个表达式

否则，建议使用单个IIf（）

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这似乎不起作用。第一个IIF出现语法错误：选择MAILINGTABLE.MailAutoNumber、MAILINGTABLE.MailLastName、MAILINGTABLE.MailFirstName、IIF（MailNewslette1OR2=1 MAILINGTABLE.MailAddr1、MAILINGTABLE.Addr2Addr1）作为Ad1、IIF（MailNewslette1OR2=1 MAILINGTABLE.MailAddr2、MAILINGTABLE.AddR2）作为Ad2，等等。我发现了语法错误。它看起来确实有效，谢谢。

IIf(MailNewsletter1or2 = 1, MailAddr1 & Chr(13) & Chr(10) &  MailAddr2 & Chr(13) & Chr(10) & MailCity & ", " & MailState & " " & MailZip,  
Addr2Addr1 & Chr(13) & Chr(10) & Addr2Addr2 & Chr(13) & Chr(10) Addr2City & ", " & Addr2State & " " & Addr2Zip) AS Address