摘要：
参考资料 https://blog.csdn.net/gvfdbdf/article/details/52084144 http://www.runoob.com/python/python-modules.html python基本概念 python模块 Python 模块(Module)，是一个 阅读全文
摘要：
删除全字段重复记录 delete from table where id not in (select T.id from (select max(id) AS id from table group by a，b，c) AS T); 阅读全文