ERROR 1093（HY000）：MySQLデータベースから

Question

mysql> delete from valeurs_actions where id not in 
    -> (select * from 
    -> (select t1.id from valeurs_actions t1 inner join(select action_id,max(temps_action) as temps_action from valeurs_actions 
    -> group by action_id) as t2 
    -> on t1.action_id=t2.action_id and t1.temps_action=t2.temps_action) 
    -> as id_as); 

を削除するときは、FROM句に更新のターゲット表 'valeurs_actions' を指定することはできません私は削除するには、次を実行しようとしたが、私はエラーを取得：ERROR 1093 (HY000): You can't specify target table 'valeurs_actions' for update in FROM clause

Answer 1

DELETE FROM valeurs_actions v1 -- use different alias here 
WHERE id NOT IN (SELECT t1.id 
        FROM valeurs_actions t1 
        INNER JOIN(SELECT v2.action_id, 
            Max(v2.temps_action) AS temps_action 
          FROM valeurs_actions v2 -- and here 
          GROUP BY v2.action_id 
          ) AS t2 
          ON t1.action_id = t2.action_id 
         AND t1.temps_action = t2.temps_action 
       ); 

注：あなたは1つの付帯番号SELECT * FROMを持っていて、不必要でした。