sql - 替换 SQL 中字符串的开头

Question

SELECT REPLACE([strUrl], '/myoldurl', '/mynewurl') FROM [UrlRewrite]

如 strUrl是 /myoldurl/myoldurl_something_else ，它返回 /mynewurl/mynewurl_something_else .我希望它是 /mynewurl/myoldurl_something_else .

如何在 SQL 中从字符串的开头替换？

Answer 1

SELECT REPLACE([strUrl], '/myoldurl/', '/mynewurl/') FROM [UrlRewrite]

解决马丁的观点:

SELECT CASE WHEN [strUrl] = '/myoldurl' THEN '/mynewurl' ELSE REPLACE([strUrl], '/myoldurl/', '/mynewurl/') END FROM [UrlRewrite]

或者

SELECT 
    CASE 
    WHEN LEFT([strUrl], LEN('/myoldurl')) = '/myoldurl'
        THEN '/mynewurl' + SUBSTRING([strUrl], LEN('/myoldurl')+1, LEN([strUrl]))
    ELSE [strUrl]
    END
FROM [UrlRewrite]