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原标题:SQL new column with pattern match

I have a column with a url sting that looks like this

http://www.somedomain.edu/rootsite1/something/something/ or http://www.somedomain.edu/sites/rootsite2/something/something

基本上,我只想把镜头归还根基(另一栏)。

因此,上述两条插图将回来:

http://www.somedomain.edu/rootsite1
http://www.somedomain.edu/sites/rootsite2

I can t compile the view with CLR, so I don t think Regex is an option.

感谢任何帮助。

最佳回答

我认为,你做得更好,把URL分割在客户一边,把它作为表格的两个部分(一个包含“root”网站,另一个载有具体网站的道路)加以保留,然后在检索后将其再次放在客户一边。

如果您选择在表格中储存这些编号,请您使用CHARINDEX,以确定在座标上出现<代码>>>.edu或/sites/,然后使用SUBSTRING,根据该指数加以细分。

如果你真的需要这样做,就是一个例子:

declare @sites table (URL varchar(500))

insert into @sites
values
( http://www.somedomain.edu/rootsite1/something/something/ ),
( http://www.somedomain.edu/sites/rootsite2/something/something )

select
    URL,
    SUBSTRING(URL, 1, case when charindex( /sites/ , URL) > 0 then 
        charindex( / , URL, charindex( /sites/ , URL) + 7) else 
        charindex( / , URL, charindex( .edu/ , URL) + 5) end - 1)

from @sites
问题回答

您可以利用CARINDEX、LEN和SUBSTRING来做到这一点,尽管这并不肯定是这样做的最佳场所。

DECLARE @testStr VARCHAR(255)
SET @testStr =  http://www.somedomain.edu/rootsite1/something/something/ 

PRINT SUBSTRING(@testStr, 0, CHARINDEX( .edu , @testStr))

不是全面解决,而是让你们开始





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