查询存储顺序值PostgreSQL中

Question

我的队员这个简单的表

id | name | score | place 

我想知道是否有这将让我score玩家进行排序，并更新place根据查询命令。

Answer 1

你可以用update做到这一点，假设id是每行独特：

update players 
    set place = p.new_place 
    from (select p.*, row_number() over (order by score) as new_place 
      from players p 
     ) p 
    where players.id = p.id; 

Answer 2

UPDATE players 
    SET place=ordered_place 
FROM (SELECT id, 'place' AS ordered_place 
     FROM players 
     ORDER BY score 
    ) AS t1 
WHERE players.id=t1.id;