Did some search on it and it's a revelation for me too. Here's what I understand based on all the articles I've read:
It's not the problem with DB adapters, it's because of the difference in how MySQL implements "group by" clause http://dev.mysql.com/doc/refman/5.0/en/group-by-hidden-columns.html Strictly speaking, both the adapters are implementing what's right as per each database. And since MySQL chose to implement "group by" clause differently and most rails devs have been using mysql as default database, we are used to use "group by" the mysql way. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-talk/-/jjD_Rq-e200J. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.

