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mysql mariadb，
之前项目用的是mysql，后来项目迁移到了别的数据库，同事数据库安装是mariadb，而Maria不支持mysql的order by + group by
https://*.com/questions/36485072/select-with-order-and-group-by-in-maria-dbmysql
https://www.icode9.com/content-2-568299.html
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草稿，有时间在写