[英]Return a substring from a specified string in SQL Server
我在下面查询:
DECLARE @url varchar (max)='http://v.mercola.com/blogs/public_blog/New-Diet-Pill-Expands-1-000-Times-in-Your-Stomach-24728.aspx'
SELECT replace(replace(RIGHT(@URL , CHARINDEX ('/' ,REVERSE(@URL))-1),'.aspx',''),'-',' ') as abc
返回以下输出:
实际输出 -
预期产出
即我想消除最后一次出现-
后的字符串。
我必须进行什么更改才能获得预期的输出。.总的来说,我想要在/
最后一次出现之后和-
最后一次出现之前的子字符串,如上所述。
请帮助并提前感谢...!
像这样:
DECLARE @url varchar (max)='http://v.mercola.com/blogs/public_blog/New-Diet-Pill-Expands-1-000-Times-in-Your-Stomach-24728.aspx'
declare @suffix varchar(max)
select @suffix = RIGHT(@URL , CHARINDEX ('/' ,REVERSE(@URL))-1)
select left(@suffix, len(@suffix) - charindex('-', reverse(@suffix)))
输出:
New-Diet-Pill-Expands-1-000-Times-in-Your-Stomach
尝试这个
DECLARE @url VARCHAR (max)='http://v.mercola.com/blogs/public_blog/New-Diet-Pill-Expands-1-000-Times-in-Your-Stomach-24728.aspx'
SELECT Reverse(LEFT(mid, Charindex('/', mid) - 1))
FROM (SELECT Substring(Reverse(@url), Charindex('-', Reverse(@url)) + 1, Len(@url)) AS mid) a
另外一个选项:
DECLARE @url varchar (max)='http://v.mercola.com/blogs/public_blog/New-Diet-Pill-Expands-1-000-Times-in-Your-Stomach-24728.aspx'
DECLARE @LastSlash int = LEN(@URL) - CHARINDEX('/', REVERSE(@URL)) + 2,
@LastMinus int = LEN(@URL) - CHARINDEX ('-', REVERSE(@URL)) + 1
SELECT SUBSTRING(@URL, @LastSlash, @LastMinus-@LastSlash)
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