在pycharm2019版本连接数据库时可能遇到连接失败的情况
![pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.](/default/index/img?u=aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzY3My80NjVmMDNjN2Y3OTRkYWQzN2Q3OTgxY2M4YjUzYzBkMS5wbmc= "pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.")
1.检查user和password是否有错
2.检查连接池是否正确
![pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.](/default/index/img?u=aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzMwNC9iNjEwNTYwOWE5M2Q3NGIzODcyMmNhNWUzY2E2ODU3MC5wbmc= "pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.")
3.试试更改区时
- 使用root用户登录mysql，输入下面命令。
show variables like “%time_zone%”;
set global time_zone = ‘+8:00’;
- MYSQL默认美国时间，而中国要迟8小时，因此将时区设置为当前系统时区即可，采用+8:00格式；
![pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.](/default/index/img?u=aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzU1Lzg2MWNmYTJlOTkwNGVlYmEyY2Y1MjI4ZmZjNTBjODY3LnBuZw== "pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.")
- 设置完成重启mysql，输入 show variables like “%time_zone%”; 查看
![pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.](/default/index/img?u=aHR0cHM6Ly9waWFuc2hlbi5jb20vaW1hZ2VzLzI2Ny8zMDQ5YTI1NWI2ZjlkNjhkNGIzN2M3MTgyOGIwNDFkYi5wbmc= "pycharm可视化数据库，错误 ：[08001] Could not create connection to database server.")
可视化数据库时，数据库保持启动状态
