T-SQL 去除所有非字母和非数字字符 [英] T-SQL strip all non-alpha and non-numeric characters
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问题描述
有没有更聪明的方法来删除所有特殊字符,而不是使用一系列大约 15 个嵌套的替换语句?
Is there a smarter way to remove all special characters rather than having a series of about 15 nested replace statements?
以下有效,但仅处理三个字符(与号、空格和句点).
The following works, but only handles three characters (ampersand, blank and period).
select CustomerID, CustomerName,
Replace(Replace(Replace(CustomerName,'&',''),' ',''),'.','') as CustomerNameStripped
from Customer
推荐答案
一种灵活的方式;
CREATE FUNCTION [dbo].[fnRemovePatternFromString](@BUFFER VARCHAR(MAX), @PATTERN VARCHAR(128)) RETURNS VARCHAR(MAX) AS
BEGIN
DECLARE @POS INT = PATINDEX(@PATTERN, @BUFFER)
WHILE @POS > 0 BEGIN
SET @BUFFER = STUFF(@BUFFER, @POS, 1, '')
SET @POS = PATINDEX(@PATTERN, @BUFFER)
END
RETURN @BUFFER
END
select dbo.fnRemovePatternFromString('cake & beer $3.99!?c', '%[$&.!?]%')
(No column name)
cake beer 399c
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