I'll probably go by using 3 queries and putting them in a transaction. Thanks
On Wed, Nov 27, 2013 at 5:38 PM, David Johnston <pol...@yahoo.com> wrote: > Dorian Hoxha wrote > > Hi, > > > > So i have (table where data will be read) : > > CREATE TABLE data (vid,cid,pid,number); > > > > Tables where data will be writen/updated: > > > > CREATE TABLE pid_top_vids (pid, vid[]) > > CREATE TABLE pid_top_cids (pid, cid[]) > > CREATE TABLE cid_top_vids (cid, vid[]) > > > > I need to , possibly in 1 query, this will run once in a while: > > Get top(10) vids , sorted by 'number',grouped by pid and update the row > in > > TABLE(pid_top_vids). > > > > Get top(10) vids, sorted by 'number', grouped by cid and update the row > in > > TABLE(cid_top_vids). > > > > Get top(10) cids, sorted by 'number', where number is the SUM() of each > > vid > > GROUP_BY(cid) and update the row in TABLE (cid_top_vids); > > > > So, get data, create sorted array, and update the rows (they exist, so > > only > > the arrays have to be updated). > > > > Possible ? > > Thanks > > I would not bother trying to do it in a single SQL statement but each query > is possible, and fairly basic, using UPDATE with a FROM clause containing > the desired sub-query. > > David J. > > > > > > -- > View this message in context: > http://postgresql.1045698.n5.nabble.com/Complex-sql-limit-for-each-group-by-arrays-updates-tp5780554p5780599.html > Sent from the PostgreSQL - general mailing list archive at Nabble.com. > > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general >
