从入门到放弃的博客

转载：https://blog.youkuaiyun.com/qq_37350706/article/details/81707862 然后配置环境变量，在path中添加mysql下的bin路径

ALTER TABLE USER DROP hahal; ALTER TABLE USER ADD UNIQUE Ha haha; ALTER TABLE `user` ADD haha INT; ALTER TABLE USER ADD CONSTRAINT FOREIGN KEY(haha) REFERENCES user_info(id); ALTER TABLE teachar REN...