> test=*# select extract (year from signup_date)::text || '/' || extract(month from signup_date)::text, count(email_address), sum(count(email_address)) over (ROWS UNBOUNDED PRECEDING) from test group by 1 order by 1; Have searched the manual and been unable to find reference to the commands 'unbounded' and 'preceding'; can someone please advise where to read about these commands? On 12/09/2013, pgsql-general-owner@xxxxxxxxxxxxxx <pgsql-general-owner@xxxxxxxxxxxxxx> wrote: > Message Digest > Volume 1 : Issue 12450 : "mime" Format > > Messages in this Issue: > Danger of renaming an enum label? > Re: Major upgrade of PostgreSQL and MySQL > Re: Call for design: PostgreSQL mugs > Re: Call for design: PostgreSQL mugs > problem with query > Re: problem with query > Re: problem with query > Re: problem with query > Re: problem with query > Re: problem with query > Re: problem with query > Re: problem with query > Re: problem with query > Re: problem with query > -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general