Question

我想删除order_id最大的行，我试过这个：

DELETE FROM orders WHERE MAX(order_id)

但这是错的！还有其他想法吗？

感谢您的时间。

Answer 1

第一个想法（在许多其他完全相同的想法中）：

DELETE FROM orders 
WHERE order_id = 
      ( SELECT MAX(order_id)
        FROM orders
      )

不幸的是MySQL抱怨：

> ERROR 1093 (HY000): You can't specify target table 'orders' for update in FROM
> clause

绕过错误的两种方法：

DELETE FROM orders 
WHERE order_id =
       ( SELECT maxo
         FROM  
           ( SELECT MAX(order_id) AS maxo
             FROM orders
           ) AS tmp
        )

或：

DELETE FROM orders
ORDER BY order_id DESC
LIMIT 1

Answer 2

对于MySQL，这将是最简单的：

DELETE FROM orders
ORDER BY order_id DESC
LIMIT 1;

你不能做其他几个人已经回答的子查询技巧，因为如果你从一个表中选择并在同一个查询中更新/删除它，MySQL就不喜欢它了。

Answer 3

你可以尝试：

DELETE FROM orders where order_id = (select max(order_id) from orders)

Answer 4

尝试子查询。

DELETE FROM orders WHERE order_id = (SELECT MAX(order_id) FROM orders)

Answer 5

尝试：

DELETE FROM orders where order_id = (SELECT MAX(order_id) FROM orders)

删除id最大的地方

5 个答案: