Query to rank rows in groups

Question

I\'m using Apache Derby 10.10.

I have a list of participants and would like to calculate their rank in their country, like this:

|        Country |           


        

Answer 1

all you need to add is a partition by country and that should give you what you need.

SELECT
Country.name,
Participant.name,
Participant.points,
ROW_NUMBER() OVER(PARTITION BY country order by Country.name, Participant.points) as country_rank
from Country
join Team
  on Country.id = Team.country_id
join Participant
  on Team.id = Participant.team_id;