python踩坑记录，mac端（持续更新）

mysql 部分

# 安装完成之后打开“系统便好设置”，最底下有Mysql，点开，点击启动mysql服务。
# 打开终端

open -e ~/.bash_profile 

# 在打开的记事本文件中滑到最下面加入

export PATH=${PATH}:/usr/local/mysql/bin

# 保存关闭，然后在终端输入

source ~/.bash_profile

# 如果再次打开终端依旧提示找不到mysql 则 打开终端 vi ~/.zshrc 添加 export PATH=${PATH}:/usr/local/mysql/bin 保存后 source ~/.zshrc 即可

# 上面的操作主要是为了加全局命令指向，接着便可以登录mysql了，打开终端输入
mysql -u root -p
# 输入初始密码，就是安装过程中输入的密码

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('新密码');

# 上面这句是基于登录mysql成功后的修改密码
# 有可能会遇到报错：mysql Client does not support authentication protocol requested by server; consider upgrading MySQL
# 解决方法
ALTER USER ‘root@localhost’ IDENTIFIED BY ‘123456’
# ---------------------------------

# navicat链接报错  Client does not support authentication protocol requested by server; consider upgrading MySQL client
# 解决方法：

ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '你的密码';
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密码';
SELECT plugin FROM mysql.user WHERE User = 'root';

# navicat 插入语句报错 Error : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near

正确：insert into `myDataBase`.`emp` (`ENAME`,`JOB`,`MGR`,`HIREDATE`,`SAL`,`COMM`,`DEPTNO`) VALUES ('mokong','sss','2','2019-10-17 17:23:49','2','2','2');
错误：insert into `myDataBase`.`emp` ('ENAME','JOB','MGR','HIREDATE','SAL','COMM','DEPTNO') VALUES ('mokong','sss','2','2019-10-17 17:23:49','2','2','2');
# 注意前面的列名和数据库数据表包裹的符号是：` 而不是 ' ，在这里卡了挺长时间一直以为是键名顺序或者主键之类的问题。

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