This problem was encountered when installing MySQL service under Windows, which was installed with MySQL green version. After installation, when connecting to MySQL service, enter the command “mysql-uroot-p”. Because the password was not set for the first login, the error message was as follows:
“ERROR 1045 (28000): Access Denied for user ‘root’@’localhost’ (using password: NO)”

The diagram below:

Solutions:
First you need to turn off the MySQL service and enter the command:
mysql> net stop MySQL
To start the local MySQL service in safe mode (note: launch the CMD window as an administrator), enter the command “MySQld — Defaults file=”G:\Install_Applications\ mysql.8.0.11 \ My.ini” –console –skip-grant — tables “to start the MySQL service, the cursor will stop without any output, which indicates that the MySQL service has been started.

Start the CMD window, and enter the command “mysql-uroot-p” to directly enter and log in to the mysql server, and then modify, you can enter the command:
(before 5.7.11) & GT; update user set password=password(“123456″) where user=”root”;

(5.7.11 or later) & GT; update user set authentication_string=password(“123456″) where user=”root”;
Here I’m using:
mysql> ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘HuaZai12345! ‘;
The diagram below:

Now exit, enter the command “mysql-uroot-p” and enter the password just set, and you can log in to the mysql server normally, as shown in the figure below:

Ok, this is the solution for ERROR 1045 (28000): Access Denied for user ‘root’@’localhost’ (using password: NO). If you have any questions, please feel free to leave me a message.

: “learn together, make progress together”, I also hope that we will pay more attention to the IT community of CSND.