Hi, On 23 September 2010 07:30, Adrian Johnson <oriolebaltim...@gmail.com> wrote: > I want to find out how many duplications are there for chr, cfrom and cto
Start with it http://www.postgresql.org/docs/9.0/interactive/tutorial-agg.html p.s. SELECT chr, cfrom, cto, count(*) FROM your_table GROUP BY 1, 2, 3; > > a. c2,19,20 are common to samples 1,2 and 3. > > since there will be many instances like that, do I have to loop over > entire rows and find common chr, cfrom and c2 and ouput with > sample_id. > how can I do that. > > thanks > adrian > > -- > Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-sql > -- Sergey Konoplev Blog: http://gray-hemp.blogspot.com / Linkedin: http://ru.linkedin.com/in/grayhemp / JID/GTalk: gray...@gmail.com / Skype: gray-hemp / ICQ: 29353802 -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
