Access 2013：为什么会出现此语法错误？

Question

在添加案例语句之前，我没有收到错误消息。如果 H1 或 H2 手机字段为空白或空，我需要添加案例语句以提供家庭电话号码作为备份（作为新手，我知道如何做到这一点的最佳方式）。出于某种原因，我在查询表达式中收到语法错误（缺少运算符）。它记录了两个 case 语句的错误。据我所知，它们写得正确……有人知道发生了什么吗？谢谢。

SELECT [H1 Last Name] & ", " & [H1 First Name] as [Full Name],[H1 E-Mail]
CASE
     WHEN [H1 Cell Phone] IS NULL
     THEN [Home Phone]
     ELSE [H1 Cell Phone] END as [Phone]

FROM NameLookup 
WHERE (((NameLookup.[H1 Last Name]) NOT LIKE '%SPEC%') OR ((NameLookup.[H1 Last Name]) NOT LIKE '%MODEL%')) AND ((NameLookup.[H1 Last Name]) IS NOT NULL)

UNION

SELECT [H2 Last Name] & ", " & [H2 First Name] as [Full Name],[H2 E-Mail]
CASE
     WHEN [H2 Cell Phone] IS NULL
     THEN [Home Phone]
     ELSE [H2 Cell Phone] END as [Phone]

FROM NameLookup 
WHERE (((NameLookup.[H1 Last Name]) NOT LIKE '%SPEC%') OR ((NameLookup.[H1 Last Name]) NOT LIKE '%MODEL%')) AND ((NameLookup.[H1 Last Name]) IS NOT NULL)


Order By 1;

Answer 1

您是否在 MS Access ACE 中使用它？案例不可用，请使用IIF(argument, true value, false value)

SELECT [H1 Last Name] & ", " & [H1 First Name] as [Full Name],[H1 E-Mail],
IIF ( [H1 Cell Phone] IS NULL, [Home Phone], [H1 Cell Phone] ) AS Phone
FROM NameLookup 

访问 SQL 函数：http://www.techonthenet.com/access/functions/