Create, authorize, delete, and change the password of a MySQL user

Test environment: WIN32 mysql5.0.45
First, declare that, in general, you need to have the root permission in MySQL to modify the mysql password and grant permissions.
Note: This operation is performed at the WIN command prompt, and phpMyAdmin is also applicable.
User: phplamp user database: phplampDB
1. Create a user.
// Log on to MYSQL
@> Mysql-u root-p
@> Password
// Create a user
Mysql> insert into mysql. user (Host, User, Password, ssl_cipher, x509_issuer, x509_subject) values ("localhost", "pppadmin", password ("passwd "),'','', '');
// Refresh the system permission list
Mysql> flush privileges;
In this way, a user named: phplamp password: 1234 is created.
Then log on.
Mysql> exit;
@> Mysql-u phplamp-p
@> Enter the password
Mysql> logon successful
2. Authorize the user.
// Log on to MYSQL (with ROOT permission ). I log on as ROOT.
@> Mysql-u root-p
@> Password
// Create a database for the user (phplampDB)
Mysql> create database phplampDB;
// Authorize the phplamp user to have all the permissions of the phplamp database.
> Grant all privileges on phplampDB. * to phplamp @ localhost identified by '123 ';
// Refresh the system permission list
Mysql> flush privileges;
Mysql> other operations
/*
If you want to assign some permissions to a user, you can write as follows:
Mysql> grant select, update on phplampDB. * to phplamp @ localhost identified by '123 ';
// Refresh the system permission table.
Mysql> flush privileges;
*/
3. delete a user.
@> Mysql-u root-p
@> Password
Mysql> delete from user WHERE User = "phplamp" and Host = "localhost ";
Mysql> flush privileges;
// Delete the user's database
Mysql> drop database phplampDB;
4. Modify the password of the specified user.
@> Mysql-u root-p
@> Password
Mysql> update mysql. user set password = password ('new password') where User = "phplamp" and Host = "localhost ";
Mysql> flush privileges;

Author "effort"