git删除所有历史提交记录,只留下最新的干净代码 1.Checkout git checkout --orphan latest_branch 2. Add all the files git add -A 3. Commit the changes git commit -am "commit message" 4. Delete the branch git branch -D master 5.Rename the current branch to master git bra
1.非ssl发送: 授权码机制,开启smtp,获取授权码以qq邮箱为例: 附件展示: #!/usr/bin/python3 import os import smtplib from email.mime.text import MIMEText from email.mime.multipart import MIMEMultipart from email.header import Header from email.mime.image import MIMEImage def main
方法一 DELETE FROM A WHERE `name` in ( SELECT a.name FROM( SELECT name FROM A a GROUP BY name HAVING COUNT(`name`)>1 )a) AND id NOT IN( SELECT b.mid FROM (SELECT MAX(`id`) AS mid FROM A b GROUP BY `name` HAVING COUNT(`name`)>1)b) ; 方法二 DELETE FROM A WH