mysql 登录是报错误Access denied for user root using password: YES
参考： https://tableplus.com/blog/2018/10/how-to-create-a-superuser-in-mysql.html
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How to create a superuser in MySQL?
This guide will walk you through the steps to create a new user in MySQL and make it a super user with root-like access to the databases.
1. First, you have to log in with the root user, which has the CREATE USER privilege
Run this command to create a new user with a password:
CREATE USER 'username'@'localhost' IDENTIFIED BY 'the_password';
At this point, the new user has no permission over the databases. The next thing to do is to grant privileges to the new user. There are several privileges a user can have:
- ALL PRIVILEGES - a full root access to the databases. If no database is specified, it has global access across the system.
- CREATE - create new tables or databases
- DROP - delete tables or databases
- DELETE - delete rows from tables
- INSERT - insert rows into tables
- SELECT - use the SELECT command to read through databases
- UPDATE - update table rows
- GRANT OPTION - grant or remove other users’ privileges
2. Make it a superuser
To make this new user a superuser, we have to provide it with full root access to everything in the database, which means to GRANT ALL PRIVILEGES:
GRANT ALL PRIVILEGES ON *.* TO 'user_name'@'localhost' WITH GRANT OPTION;
It’s done, the new user now has the root-like permission.
3. Then create another account for the same new username
CREATE USER 'username'@'%' IDENTIFIED BY 'the_password';
And grant full root access:
GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' WITH GRANT OPTION;
Both 'username'@'localhost' and 'username'@'%' are superuser accounts with full privileges to do anything.
The 'username'@'localhost' account can be used only when connecting from the local host. The 'username'@'%' account uses the '%' wildcard for the host part, so it can be used to connect from any host.
4. To double check the privileges given to the new user, run SHOW GRANTS command:
SHOW GRANTS FOR username;
5. Finally, when everything is settled, reload all the privileges:
FLUSH PRIVILEGES;
And all the changes will take effect immediately.
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