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2018年8月23日

摘要：需要安装这个 pymysql 写法还是很简单的# -*- coding: utf-8 -*- # Define your item pipelines here # # Don't forget to add your pipeline to the ITEM_PIPELINES setting # See: https://doc.scrapy.org/en/latest/topics/it... 阅读全文

posted @ 2018-08-23 15:22 ddzh2020 阅读(889) 评论(0) 推荐(0)

mysql 删掉重复数据

摘要： --不知道为啥这个mysql外边还要包一层，不然就报错DELETE FROM course WHERE name IN ( select mm.name from ( SELECT a.name as name FROM course a GROUP BY ... 阅读全文

posted @ 2018-08-23 15:02 ddzh2020 阅读(164) 评论(0) 推荐(0)