关于sql：mysql：按用户获取最后的会话记录

mysql: Get last conversation records by user

本问题已经有最佳答案，请猛点这里访问。

我需要通过to_user以降序获取最后的会话记录。
我有一个叫做消息的表。请看下面的截图：
enter image description here

我希望以下列方式输出：

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from_user| to_user | message |
241 | 226 | How are you? |
241 | 256 | Hi test message |

我试过这个查询：

1	SELECT * FROM `messages` where from_user=241 group by to_user order by created DESC

我得到以下输出错误：

enter image description here

提前致谢。

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试试他的：

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SELECT t1.*
FROM `messages` AS t1
JOIN (
SELECT to_user, MAX(created) AS created
FROM `messages`
WHERE from_user=241
GROUP BY to_user
) AS t2 ON t1.to_user = t2.to_user AND t1.created = t2.created
WHERE from_user=241
ORDER BY t1.created DESC

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SELECT *
FROM
(SELECT *
FROM `messages`
WHERE from_user=241
ORDER BY created DESC) as test
GROUP BY to_user

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如果你想在一个字段中发布from_user的所有帖子(误解了我认为的问题)：

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SELECT group_concat(messages.message)
FROM messages
WHERE from_user = 241
GROUP BY to_user
ORDER BY MAX(id) DESC

您必须说明您希望订购哪种标准。您可以开始对话或对话的最后一条消息。

试试这个

1	SELECT * FROM `messages` where from_user=241 group by to_user order by id , created DESC

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