除了提升之外，是否可以按任何顺序进行分组？

I have a query that joins a couple of tables and produces a lot of rows, in a situation where I only wish to see one row per user. I have solved the "only one user" problem by using group by user.id, however, I'm noticing that now for each user I get the values from the joined table that represent the first entry (rather than the last).I have a query that joins a couple of tables an