Question

如何在开头，结尾或两个空格之间删除逗号？

例如：

DECLARE @str NVARCHAR(max)=N' , test1 '; select * from functionReplace(@str) =N'test1;

SET @str = '1 , 2 ,';select * from functionReplace(@str) =N'1 , 2';
SET @str = ', ';select * from functionReplace(@str) = empty=N'';

你能帮我写一个函数吗？

Answer 1

在这里，您可以找到具有标量函数的解决方案。与您的预期产出的唯一区别是＆＃34; 1,2＆＃34;来到＆＃34; 1 2＆＃34; ...

CREATE FUNCTION dbo.functionReplaceComma(@str NVARCHAR(MAX))
RETURNS NVARCHAR(MAX)
AS
BEGIN
    RETURN (SELECT LTRIM(RTRIM(REPLACE(N' ' + @str + N' ',N' , ',N' '))));
END
GO

SELECT dbo.functionReplaceComma(N', this is , a test , with commas word1, word2, in between and at start and ending ,');
--this is a test with commas word1, word2, in between and at start and ending

SELECT dbo.functionReplaceComma(N' , test1 ');
--test1

SELECT dbo.functionReplaceComma(N'1 , 2 ,');
--1 2

SELECT dbo.functionReplaceComma(N', ');
--empty

替换数据库文本列中的逗号

1 个答案: