MySQL Add new user and modify password method

MySQL tutorial Add new user and modify password method

Format: Mysqladmin-u username-P Old password password new password

1, to root add a password ab12. First enter the directory Mysqlbin in DOS, and then type the following command:

Mysqladmin-uroot-password AB12

Note: Since Root does not have a password at the beginning, the-p old password can be omitted.

2, and then the root of the password changed to djg345.

MYSQLADMIN-UROOT-PAB12 Password djg345

Vii. Add new users. (Note: Unlike the above, the following are the commands in the MySQL environment, followed by a semicolon as the command Terminator)

Format: Grant Select on Database Tutorial. * To User name @ login host identified by "password"

Example 1, add a user test1 password for ABC, so that he can log on any host, and all databases have query, insert, modify, delete permissions. First connect the root user to MySQL, and then type the following command:

Grant Select,insert,update,

Delete on *.* to test1@ "%" identified by "ABC";

But for example 1 the increased user is very dangerous and you want someone who knows Test1 's password so that he can log on to your MySQL database on any computer on the Internet and can do whatever it wants with your data, as shown in Example 2.

Example 2, add a user test2 password for ABC, so that he can only log on the localhost, and can query the database mydb, insert, modify, delete operations (localhost refers to the local host, that is, the MySQL database of the host), This allows a user to use a password that knows test2, and he cannot access the database directly from the Internet, only through a Web page on the MySQL host.

Grant Select,insert,update,

Delete on mydb.* to test2@localhost identified by "ABC";

If you do not want to test2 the password, you can make another command to eliminate the password.

Grant Select,insert,update,delete on MyDB

. * To Test2@localhost identified by "";