摘要: https://wizardforcel.gitbooks.io/wangdaokaoyan-os/content/19.html https://www.jianshu.com/p/a5cdcb909d81 https://github.com/taizilongxu/interview_pyth 阅读全文
posted @ 2018-10-18 22:47 Operater 阅读(74) 评论(0) 推荐(0) 编辑
摘要: 删除表中重复的记录 参考https://www.cnblogs.com/fanjp666888/p/8383906.html 阅读全文
posted @ 2018-10-18 17:38 Operater 阅读(144) 评论(0) 推荐(0) 编辑
摘要: 执行sql group by查询时报错 SELECT id from userz GROUP BY username Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'u 阅读全文
posted @ 2018-10-18 17:02 Operater 阅读(1276) 评论(0) 推荐(0) 编辑
摘要: 删除了c盘的垃圾文件之后,pycharm就一直scanning files to index 解决方法: 点击file,然后选择invalidate caches / restart ...,再弹出的对话框中点击Invalidate and restart,然后它可以短时间完成扫描,不再挂起 参考h 阅读全文
posted @ 2018-10-18 11:51 Operater 阅读(5722) 评论(0) 推荐(0) 编辑