您可以尝试以下方法：
DECLARE @tbl TABLE(YourString VARCHAR(100));
INSERT INTO @tbl VALUES('+Payment'),('->300 Write'),('-:<Test,:%');
SELECT SUBSTRING(YourString,A.posFirst,A.posLast-A.posFirst+2)
FROM @tbl
OUTER APPLY(SELECT PATINDEX('%[a-zA-Z0-9]%',YourString) AS posFirst
,LEN(YourString)-PATINDEX('%[a-zA-Z0-9]%',REVERSE(YourString)) AS posLast) AS A
结果
Payment
300 Write
Test
您可以向模式添加任何允许的字符…
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