Hi, In some code I am taking over, I found this query:
select count(t.trame_id) as count, v.voiture_num as voitureNum from arch_trames t left join voiture v on (v.tag_id=t.tag_id) where (t.recept_time >= 1243509320691) and exists (select v2.voiture_num from voiture v2 where v2.tag_id=v.tag_id) group by v.voiture_num order by v.voiture_num Am I right that I can replace the "and exists..." clause by "and v.voiture_num is not null " in this case? Thanks Raphaël -- Web database: http://www.myowndb.com Free Software Developers Meeting: http://www.fosdem.org -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
