Extract hostname from a URL

I have to trim the website name upto ".com" or"co.in" in sql

example: lets assume i have site address as"http://stackoverflow.com/questions/ask?title=trim". I need to get the result as "stackoverflow.com".

some scenario it may be like "www.google.co.in" then i need it to be "google.co.in"

Please use the below SQL code to extract the domain name:

DECLARE @WebUrl VARCHAR(35);
SET @WebUrl = 'http://stackoverflow.com/questions/ask?title=trim'

SELECT @WebUrl AS 'WebsiteURL',
       LEFT(SUBSTRING(@WebUrl, 
       (CASE WHEN CHARINDEX('//',@WebUrl)=0 
            THEN 5 
            ELSE  CHARINDEX('//',@WebUrl) + 2
            END), 35),
       (CASE 
       WHEN CHARINDEX('/', SUBSTRING(@WebUrl, CHARINDEX('//', @WebUrl) + 2, 35))=0 
       THEN LEN(@WebUrl) 
       else CHARINDEX('/', SUBSTRING(@WebUrl, CHARINDEX('//', @WebUrl) + 2, 35))- 1
       END)
       ) AS 'Domain';