Comment résoudre l'erreur SQL: « Chaque table dérivée doit avoir son propre alias » en cas de jointures

Question

J'utilise cette requête:

select max(counted) 
from (select max(outcome.player_of_match) counted 
from outcome 
inner join player 
on player.id=outcome.player_of_match group by player.id); 

Il montre l'erreur SQL:

Every derived table must have its own alias.

Answer 1

Vous avez juste besoin d'ajouter un alias à la sous-requête que vous sélectionnez:

select max(T1.counted) 
from (
      select  max(outcome.player_of_match) counted 
      from  outcome 
      inner join player 
        on player.id=outcome.player_of_match 
      group by player.id 
     ) AS T1;