Re: Extracting hostname from URI column

ogjunk-pgjedan(at)yahoo(dot)com wrote:
>
> And what I'd like is something that would give me the counts for the number of occurrences of each unique hostname. Something much like `uniq -c'. Can anyone tell me how that's done or where I should look for info? (I'm not sure what to look for, that's the problem).
>
> Thanks,
> Otis
>

Just use distinct...

test=# select distinct count(*),substring( href from '.*://([^/]*)' ) as
domain from url group by domain order by domain;
count | domain
-------+--------------------------
3 | devedge.netscape.com
1 | dictionary.reference.com
2 | forums.mozillazine.org
1 | groups.google.com
4 | texturizer.net
11 | www.google.com
2 | www.mozillazine.org
(7 rows)

--
Paul Lambert
Database Administrator
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