替换SQL中的字符串开头

Question

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

如果strUrl是/myoldurl/myoldurl_something_else,则返回/mynewurl/mynewurl_something_else.我想要它/mynewurl/myoldurl_something_else.

我如何从SQL中的字符串开头替换？

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]

要么

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