如何在子查詢中使用delete語句 - 錯誤1093？

Question

此查詢返回我需要刪除的辦公元組。

SELECT id, reference FROM office o 
WHERE o.id NOT IN 
    (SELECT c.office_id FROM Contract c WHERE office_id IS NOT NULL) 
AND o.reference IN 
    (SELECT o.reference FROM Contract c JOIN office o ON c.office_id = o.id WHERE office_id IS NOT NULL); 

但是，當我寫的查詢

DELETE FROM office 
WHERE id NOT IN 
    (SELECT c.office_id FROM Contract c WHERE office_id IS NOT NULL) 
AND reference IN 
    (SELECT o.reference FROM Contract c JOIN office o ON c.office_id = o.id WHERE office_id IS NOT NULL); 

我有以下錯誤：#1093 - You can't specify target table 'office' for update in FROM clause

但我實在看不出如何解決這個..

任何幫助將不勝感激！

Answer 1

嘗試

DELETE FROM office 
WHERE id NOT IN 
(SELECT c.office_id FROM Contract c 
WHERE office_id IS NOT NULL) 
AND reference IN 
(select * from (SELECT o.reference FROM Contract c 
JOIN office o ON c.office_id = o.id 
WHERE office_id IS NOT NULL) x); 

，因爲你不能從你在哪裏選擇表中刪除。但是，使用

select * from (select col from your_table) x 

應該做的伎倆