查詢存儲順序值PostgreSQL中

Question

我的隊員這個簡單的表

id | name | score | place 

我想知道是否有這將讓我score玩家進行排序，並更新place根據查詢命令。

Answer 1

你可以用update做到這一點，假設id是每行獨特：

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;