Am 23.08.2012 10:45, schrieb Condor: > On , Frank Lanitz wrote: >> Am 23.08.2012 09:52, schrieb Condor: >>> Hello ppl, >>> >>> I try to make query and see how many ids have more then one row. >>> >>> few records is: >>> >>> ids | val | some >>> a | 1 | x >>> a | 1 | v >>> b | 1 | x >>> b | 2 | c >>> >>> >>> I focus on ids and val with: >>> >>> SELECT ids, val FROM table WHERE ids = 'a' GROUP BY ids, val HAVING >>> COUNT(ids) > 1; >>> >>> and result is: >>> >>> ids | val >>> a | 1 >>> >>> Well in this condition pgsql shold not return me positive result because >>> on documentation I read having count work on group clause, >>> and when I group these two records based on ids = 'a' they become to one >>> row and my condition is if the result after grouping is greeter then 1. >>> >>> I use postgresql 9.1.4 x64 >>> >>> >>> Any one can tell me what I miss ? >> >> >> Not sure I understand you correct, but maybe count() is working for you. >> Maybe you would need some primary key for good values. >> >> cheers, >> Frank > > > Sorry for my email, > after some thinking I understand my error and change query to: > > SELECT COUNT(DISTINCT val), ids FROM table WHERE ids = 'a' GROUP BY ids > HAVING COUNT(DISTINCT val) > 1; > > and it's work.
At least I was wrong in understanding your request. ;) But glad, you found a solution. Cheers, Frank -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
