mysql5.7以后排序在分组，查询每组最新记录

原创地址：https://blog.csdn.net/qq_40012458/article/details/121745497

感谢博主的文章！别人已经写得很不错了，我就不写了，写个语句放在这里供参考

SELECT
　　id,project_id,progress_content
FROM
(

　　SELECT DISTINCT(id),project_id, progress_content FROM tb_projectprogress ORDER BY id DESC
) AS tpp
GROUP BY
project_id