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我当前的代码工作并突出显示带有非法（隐藏）字符的电子邮件地址，这些字符会进入下游系统并破坏它们。问题是可以使语句更有效，并说搜索 CHAR(1) 和 CHAR(31) 之间的任何字符，而不是列出每一行吗？

SELECT * FROM [Table1].[customer]
  where  
EMAIL_ADDR like '%'+CHAR(1) +'%' or
EMAIL_ADDR like '%'+CHAR(2) +'%' or
EMAIL_ADDR like '%'+CHAR(3) +'%' or
EMAIL_ADDR like '%'+CHAR(4) +'%' or
EMAIL_ADDR like '%'+CHAR(5) +'%' or
EMAIL_ADDR like '%'+CHAR(6) +'%' or
EMAIL_ADDR like '%'+CHAR(7) +'%' or
EMAIL_ADDR like '%'+CHAR(8) +'%' or
EMAIL_ADDR like '%'+CHAR(9) +'%' or
EMAIL_ADDR like '%'+CHAR(10)+'%'  or
EMAIL_ADDR like '%'+CHAR(11)+'%'  or
EMAIL_ADDR like '%'+CHAR(12)+'%'  or
EMAIL_ADDR like '%'+CHAR(13)+'%'  or
EMAIL_ADDR like '%'+CHAR(14)+'%'  or
EMAIL_ADDR like '%'+CHAR(15)+'%'  or
EMAIL_ADDR like '%'+CHAR(16)+'%'  or
EMAIL_ADDR like '%'+CHAR(17)+'%'  or
EMAIL_ADDR like '%'+CHAR(18)+'%'  or
EMAIL_ADDR like '%'+CHAR(19)+'%'  or
EMAIL_ADDR like '%'+CHAR(20)+'%'  or
EMAIL_ADDR like '%'+CHAR(21)+'%'  or
EMAIL_ADDR like '%'+CHAR(22)+'%'  or
EMAIL_ADDR like '%'+CHAR(23)+'%'  or
EMAIL_ADDR like '%'+CHAR(24)+'%'  or
EMAIL_ADDR like '%'+CHAR(25)+'%'  or
EMAIL_ADDR like '%'+CHAR(26)+'%'  or
EMAIL_ADDR like '%'+CHAR(27)+'%'  or
EMAIL_ADDR like '%'+CHAR(28)+'%' or
EMAIL_ADDR like '%'+CHAR(29)+'%' or
EMAIL_ADDR like '%'+CHAR(30)+'%' or
EMAIL_ADDR like '%'+CHAR(31)+'%'
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1 回答 1

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在 SQL Server 中，您应该能够使用字符类：

where EMAIL_ADDR like '%[' + CHAR(1) + CHAR(2) + CHAR(3) + . . . ']%'

但是，检查允许的字符可能更简单：

where email_addr like '%[-a-zA-Z0-9_.@]%'

或您允许的任何字符列表。

于 2021-07-02T10:16:32.863 回答