SQLの文字列から余分な文字を削除する方法は？

Question

T-SQLの新機能です。私はピボットの後に抽出している列から文字列や行から余分な文字を削除するためにあなたの助けが必要です。

文字列は次のようになります。?<span style="color:rgb background color then actual string. データを抽出する際に、これらの特別な文字を削除します。

私は、文字列の先頭や末尾から置き換える/削除するには見つけることができるではなく、文字列から上記の文字のを削除する方法がわから

おかげ

Answer 1

はpatexclude8K

CREATE FUNCTION dbo.PatExclude8K 
(
    @String VARCHAR(8000), 
    @Pattern VARCHAR(50) 
) 
/******************************************************************************* 
Purpose: 
Given a string (@String) and a pattern (@Pattern) of characters to remove, 
remove the patterned characters from the string. 

Usage: 
--===== Basic Syntax Example 
SELECT CleanedString 
FROM dbo.PatExclude8K(@String,@Pattern); 

--===== Remove all but Alpha characters 
SELECT CleanedString 
FROM dbo.SomeTable st 
CROSS APPLY dbo.PatExclude8K(st.SomeString,'%[^A-Za-z]%'); 

--===== Remove all but Numeric digits 
SELECT CleanedString 
FROM dbo.SomeTable st 
CROSS APPLY dbo.PatExclude8K(st.SomeString,'%[^0-9]%'); 

Programmer Notes: 
1. @Pattern is not case sensitive (the function can be easily modified to make it so) 
2. There is no need to include the "%" before and/or after your pattern since since we 
    are evaluating each character individually 

Revision History: 
Rev 00 - 10/27/2014 Initial Development - Alan Burstein 

Rev 01 - 10/29/2014 Mar 2007 - Alan Burstein 
     - Redesigned based on the dbo.STRIP_NUM_EE by Eirikur Eiriksson 
      (see: http://www.sqlservercentral.com/Forums/Topic1585850-391-2.aspx) 
     - change how the cte tally table is created 
     - put the include/exclude logic in a CASE statement instead of a WHERE clause 
     - Added Latin1_General_BIN Colation 
     - Add code to use the pattern as a parameter. 

Rev 02 - 11/6/2014 
     - Added final performane enhancement (more cudo's to Eirikur Eiriksson) 
     - Put 0 = PATINDEX filter logic into the WHERE clause 

Rev 03 - 5/16/2015 
     - Updated code to deal with special XML characters 
*******************************************************************************/ 
RETURNS TABLE WITH SCHEMABINDING AS 
RETURN 
WITH 
E1(N) AS (SELECT N FROM (VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL)) AS X(N)), 
itally(N) AS 
(
    SELECT TOP(CONVERT(INT,LEN(@String),0)) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) 
    FROM E1 T1 CROSS JOIN E1 T2 CROSS JOIN E1 T3 CROSS JOIN E1 T4 
) 
SELECT NewString = 
((
    SELECT SUBSTRING(@String,N,1) 
    FROM iTally 
    WHERE 0 = PATINDEX(@Pattern,SUBSTRING(@String COLLATE Latin1_General_BIN,N,1)) 
    FOR XML PATH(''),TYPE 
).value('.[1]','varchar(8000)')); 
GO 

のコピーをつかみます

どの文字を削除したいのか明確ではありませんが、ここには の例がいくつかあります（私のコメントに注意してください）：

-- remove letters: 
SELECT * FROM dbo.PatExclude8K('abc123!', '[a-zA-Z]'); 
-- Returns: 123! 
; 
-- remove numbers: 
SELECT * FROM dbo.PatExclude8K('abc123!', '[0-9]'); 
--Returns: abc! 
; 
-- only include letters and numbers 
SELECT * FROM dbo.PatExclude8K('###abc123!!!', '[^0-9a-zA-Z]'); 
--Returns: abc123 
; 
-- Remove spaces (note the spaces): 
SELECT * FROM dbo.PatExclude8K('XXX 123 ZZZ', ' '); 
--Returns: XXX123ZZZ 
; 
-- only include letters and "!, ? or ." 
SELECT * FROM dbo.PatExclude8K('123# What?!... ', '[^a-zA-Z!?.]'); 
--Returns: What?!...