sql - 存取2013 : Why am I getting this Syntax Error?

Question

在添加case语句之前，我没有收到错误。如果H1或H2手机字段为空或为空(作为新手，我最好的方法)，我需要添加case语句以提供家庭电话号码作为备份。由于某种原因，我在查询表达式中遇到了语法错误(缺少运算符)。它记录了两个case语句的错误。据我所知，它们的书写方式正确……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

您在MS Access ACE中使用它吗？大小写不可用，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/