MySQL Add user, delete user and authorization

Source: Internet
Author: User

Transferred from: http://www.cnblogs.com/fly1988happy/archive/2011/12/15/2288554.html

MySQL add user, new database, user authorization, delete user, change password (note that each line followed by A; indicates that a command statement ends):

1. Create a new user

1.1 Log in to MySQL:

@>mysql-u root-p

@> Password

1.2 Create User:

mysql> INSERT INTO Mysql.user (Host,user,password) VALUES ("localhost", "Test", Password ("1234"));

This creates a user named: Test with a password of: 1234.

Note: "localhost" here means that the user can only log on locally and cannot telnet to another machine. If you want to telnet, change "localhost" to "%", which means you can log on on any computer. You can also specify that a machine can log on remotely.

1.3 Then log in:

mysql>exit;

@>mysql-u test-p

@> Enter password

Mysql> Login Successful

2. Authorizing the user

Authorization format: Grant permissions on database. * To User name @ login host identified by "password";

2.1 Log in to MySQL (rooted), log in as root here:

@>mysql-u root-p

@> Password

2.2 First create a database for the user (TestDB):

Mysql>create database TestDB;

2.3 Authorization test The user has all permissions for the TestDB database (all permissions for a database):

Mysql>grant all privileges in testdb.* to [e-mail protected] identified by ' 1234 ';

Mysql>flush privileges;//Refresh System Permissions Table

Format: Grant permissions on database. * To User name @ login host identified by "password";

2.4 If you want to specify a partial permission to a user, you can write:

Mysql>grant select,update on testdb.* to [e-mail protected] identified by ' 1234 ';

Mysql>flush privileges; Refresh System Permissions Table

2.5 Authorization test The user has some permissions for all databases:

Mysql>grant Select,delete,update,create,drop On * * to [e-mail protected] "%" identified by "1234";

The test user has Select,delete,update,create,drop permissions on all databases.

@ "%" indicates authorization for all non-local hosts, excluding localhost. (The localhost address is set to 127.0.0.1, if set to the real local address, do not know whether it can, no authentication.) )

Authorization to localhost: plus a grant all privileges on testdb.* to [email protected] identified by ' 1234 ';

3. Delete a user

@>mysql-u root-p

@> Password

Mysql>delete from Mysql.user Where user= ' test ' and host= ' localhost ';

Mysql>flush privileges;

Mysql>drop database TestDB; Delete a user's database

Delete account and permissions: >drop user username @ '% ';

>drop user username @ localhost;

4. Modify the specified user password

@>mysql-u root-p

@> Password

Mysql>update Mysql.user Set Password=password (' New password ') where user= "test" and host= "localhost";

Mysql>flush privileges;

5. List all databases

Mysql>show databases;

6. Switching the database

Mysql>use ' database name ';

7. List all Tables

Mysql>show tables;

8. Display the data table structure

Mysql>describe table name;

9. Deleting databases and data tables

Mysql>drop database name;

Mysql>drop table Data Sheet name;

MySQL Add user, delete user and authorization

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.