我如何能够替换不在指定范围内的所有字符?
DECLARE @s VARCHAR(max)
DECLARE @allowedChars VARCHAR(max)
SET @s = 'Foo@Bar !'
SET @allowedChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ$_/+-.0123456789'
SELECT MAGICREPLACE(@s, @allowedChars,'_');
--Should return 'F___B____'
最佳答案 单程:
CREATE FUNCTION [dbo].MAGICREPLACE(@BUFFER VARCHAR(MAX), @PATTERN VARCHAR(128), @REPL VARCHAR(1)) RETURNS VARCHAR(MAX) AS
BEGIN
DECLARE @POS INT = PATINDEX(@PATTERN, @BUFFER COLLATE SQL_Latin1_General_CP1_CS_AS)
WHILE @POS > 0 BEGIN
SET @BUFFER = STUFF(@BUFFER, @POS, 1, @REPL)
SET @POS = PATINDEX(@PATTERN, @BUFFER COLLATE SQL_Latin1_General_CP1_CS_AS)
END
RETURN @BUFFER
END
对于
SELECT dbo.MAGICREPLACE('Foo@Bar !', '%[^ABCDEFGHIJKLMNOPQRSTUVWXYZ0-9$_/+-.]%', '_')
> F___B____