Question

如何找到用户的国家排名和世界排名？请SQL查询如何制作

SELECT leaderboards.leaderboard_id, 
       users.name, 
       users.country, 
       users.points, 
       users.email, 
       leaderboards.score, 
       Find_in_set(users.points, (SELECT Group_concat(users.points ORDER BY 
                                         users.points DESC) 
                                  FROM   users))              AS world_rank, 
       Find_in_set(leaderboards.score, (SELECT 
       Group_concat(leaderboards.score ORDER BY 
       leaderboards.score DESC) 
                                        FROM   leaderboards)) AS rank, 
       leaderboards.created_date, 
       leaderboards.time_stamp 
FROM   users 
       INNER JOIN leaderboards 
               ON users.user_id = leaderboards.user_id 
WHERE  users.user_type = 2

上面的查询，我必须获得世界排名，但是如何找到国家排名

Answer 1

从排行榜ld联接中选择ld.leaderboard_id，c.name，c.points，c.world_rank，c.country_rank，ld.created_date，ld.time_stamp b。）从用户处获得b.points DESC）b））AS world_rank，FIND_IN_SET（un.points，（SELECT GROUP_CONCAT（un.points ORDER BY un.points DESC）from users un WHERE un.country = b.country））AS country_rank ，b。* FROM users un JOIN（SELECT u.name，u.user_type，u.country，u.points，u.user_id FROM users u）b ON b.user_id = un.user_id WHERE b.points！='' AND b.user_type = 2）c ON c.user_id = ld.user_id ORDER BY c.points DESC enter image description here

如何找到用户的国家排名和世界排名？

1 个答案: