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我需要一个 MySQL 语句来从我的表中删除最旧的 10 个条目，但是我能得到的最接近的是：

   DECLARE ID INT;
   SET ID = (SELECT CallbackID FROM callbacks ORDER BY CallbackID LIMIT 1 OFFSET 9);

   DELETE FROM callbacks WHERE callbackID <= ID;

如果总是至少有 10 个条目，这很好，但当条目较少时，ID 未设置，因此删除语句失败。

有任何想法吗？谢谢

编辑：也试过这个：

   DECLARE ID INT;
   SET ID = (SELECT CallbackID FROM callbacks ORDER BY CallbackID LIMIT 1 OFFSET 9);

   if ID IS NOT NULL THEN

   DELETE FROM callbacks WHERE callbackID <= ID;
   END IF;
4

4 回答 4

1 
DELETE FROM callbacks ORDER BY callbackID DESC LIMIT 10
于 2012-08-29T15:54:01.043 回答
1

在 之后SET，您只需要一个 if 语句来检查是否ID设置了，如果是则进行查询，否则执行其他操作或不执行任何操作。

于 2012-08-29T15:54:05.320 回答
1 
DELETE FROM callbacks 
WHERE callbackID in (
    SELECT CallbackID 
    FROM callbacks 
    ORDER BY CallbackID LIMIT 10
)
于 2012-08-29T15:52:39.147 回答
1

怎么样：

DELETE FROM callbacks ORDER BY CallbackID LIMIT 10;

是的，它有效:)

于 2012-08-29T15:52:43.733 回答