MySQL account creation, authorization, deletion

One, create the user:

Command: CREATE USER ' username ' @ ' host ' identified by ' password ';

Description: Username-the user name that you will create, host-Specifies which host the user can log on to, if localhost is available to local users, you can use the wildcard% if you want the user to be able to log on from any remote host. Password-The user's login password, the password can be empty, if it is empty, the user can not require a password to log on to the server.

Example: CREATE USER ' dog ' @ ' localhost ' identified by ' 123456 ';
CREATE USER ' pig ' @ ' 192.168.1.101_ ' idendified by ' 123456 ';
CREATE USER ' pig ' @ '% ' identified by ' 123456 ';
CREATE USER ' pig ' @ '% ' identified by ';
CREATE USER ' pig ' @ '% ';

Two, Authorization:

Command: GRANT privileges on databasename.tablename to ' username ' @ ' host '

Description: Privileges-user's operation permissions, such as SELECT, INSERT, UPDATE, etc. (see the last side of the article for a detailed list). Use all if you want to grant the permission. DatabaseName-database name, tablename-table name, if you want to grant the user the appropriate operation permissions on all databases and tables, the * representation, such as *. *.

Example: GRANT SELECT, INSERT on Test.user to ' pig ' @ '% ';
GRANT all on * * to ' pig ' at '% ';

Note: A user authorized with the above command cannot authorize another user, and if you want the user to be authorized to do so, use the following command:
GRANT privileges on Databasename.tablename to ' username ' @ ' host ' with GRANT OPTION;

three. Setting and changing user passwords

Command: Set PASSWORD for ' username ' @ ' host ' = PASSWORD (' NewPassword '), if current user is logged in with set PASSWORD = PASSWORD ("NewPassword");

Example: SET PASSWORD for ' pig ' @ '% ' = PASSWORD ("123456");

four. Revoke user rights

Command: REVOKE privilege on databasename.tablename from ' username ' @ ' host ';

Description: Privilege, DatabaseName, TableName-With the authorization section.

Example: REVOKE SELECT on * * from ' pig ' @ '% ';

Note: If you are giving the user ' pig ' @ '% ' authorization (or similar): Grant SELECT on Test.user to ' pig ' @ '% ', then use revoke select On * * from ' pig ' @ '% '; A select operation for the user table in the test database. Conversely, if the authorization is to use the grant SELECT on * * to ' pig ' @ '% ', then the revoke select on Test.user ' pig ' @ '% '; Revoke the user's SELECT permission to the Users table in the test database.

Specific information can be used with the command show GRANTS for ' pig ' @ '% '; View.

Five. Delete a user

Command: DROP USER ' username ' @ ' host ';

Schedule: Permissions for operations in MySQL

Alter	Allows use of ALTER TABLE.
ALTER ROUTINE	Alters or drops stored routines.
CREATE	Allows use of CREATE TABLE.
CREATE ROUTINE	Creates stored routines.
CREATE Temporary TABLE	Allows use of CREATE temporary TABLE.
CREATE USER	Allows use of the CREATE user, DROP user, RENAME user, and REVOKE all privileges.
CREATE VIEW	Allows use of CREATE VIEW.
DELETE	Allows use of DELETE.
DROP	Allows use of DROP TABLE.
EXECUTE	Allows the user to run stored routines.
FILE	Allows use of SELECT... Into OUTFILE and LOAD DATA INFILE.
INDEX	Allows use of CREATE index and DROP index.
INSERT	Allows use of INSERT.
LOCK TABLES	Allows use of LOCK TABLES on TABLES for which the user also have SELECT privileges.
PROCESS	Allows use of the SHOW full processlist.
RELOAD	Allows use of FLUSH.
REPLICATION	Allows the user to ask where slave or master
CLIENT	Servers is.
REPLICATION SLAVE	Needed for replication slaves.
SELECT	Allows use of SELECT.
SHOW DATABASES	Allows use of SHOW DATABASES.
SHOW VIEW	Allows use of SHOW CREATE VIEW.
SHUTDOWN	Allows use of mysqladmin shutdown.
SUPER	Allows use of change master, KILL, PURGE master LOGS, and SET GLOBAL SQL statements. Allows mysqladmin debug command. Allows one extra connection to be made if maximum connections is reached.
UPDATE	Allows use of UPDATE.
USAGE	Allows connection without any specific privileges.

MySQL account creation, authorization, deletion