Adrian Klaver-4 wrote >> >> If I am only interested in get 2 entries per result set, I would expect >> to see > > Actually <=2. > How do you determine which rows to keep, by id or something else? > >> >> 1 xx,yy >> 2 xx,yy >> >> >> 1,dd,zz >> 2,dd,zz >> >> 1, ee,ff >> >> Using LIMIT only gives >> 1 xx,yy >> 2 xx,yy >> >> Sorry for not explaining it very, I want to limit the size of an >> inviduail set of records which is part of set of records. > > It would help if we could see the actual query you are using to get the > result sets, suitably anonymized if needed. The general answer is that you use a window clause and a row_number() function over an appropriate partiton. Put that in a subquery then in the outer query add a where clause for row_number <= 2. David J. -- View this message in context: http://postgresql.nabble.com/returning-only-part-of-a-rule-set-tp5828217p5828226.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
