Mysql创建及删除用户命令_MySQL

一, 创建用户:


命令:CREATE USER 'username'@'host' IDENTIFIED BY 'password';


说明:username - 你将创建的用户名, host - 指定该用户在哪个主机上可以登陆,如果是本地用户可用localhost, 如果想让该用户可以从任意远程主机登陆,可以使用通配符%. password - 该用户的登陆密码,密码可以为空,如果为空则该用户可以不需要密码登陆服务器.


例子: CREATE USER 'username'@'localhost' IDENTIFIED BY '123456';
CREATE USER 'username'@'192.168.1.101_' IDENDIFIED BY '123456';
CREATE USER 'username'@'%' IDENTIFIED BY '123456';
CREATE USER 'username'@'%' IDENTIFIED BY '';
CREATE USER 'username'@'%';


二,授权:


命令:GRANT privileges ON databasename.tablename TO 'username'@'host'


说明: privileges - 用户的操作权限,如SELECT , INSERT , UPDATE 等(详细列表见该文最后面).如果要授予所的权限则使用ALL.;databasename - 数据库名,tablename-表名,如果要授予该用户对所有数据库和表的相应操作权限则可用*表示, 如*.*.


例子: GRANT SELECT, INSERT ON test.user TO 'username'@'%';
GRANT ALL ON *.* TO 'username'@'%';


注意:用以上命令授权的用户不能给其它用户授权,如果想让该用户可以授权,用以下命令:
GRANT privileges ON databasename.tablename TO 'username'@'host' WITH GRANT OPTION;


三.设置与更改用户密码


命令:SET PASSWORD FOR 'username'@'host' = PASSWORD('newpassword');如果是当前登陆用户用SET PASSWORD = PASSWORD("newpassword");


例子: SET PASSWORD FOR 'username'@'%' = PASSWORD("123456");


四.撤销用户权限


命令: REVOKE privilege ON databasename.tablename FROM 'username'@'host';


说明: privilege, databasename, tablename - 同授权部分.


例子: REVOKE SELECT ON *.* FROM 'username'@'%';


注意: 假如你在给用户'username'@'%'授权的时候是这样的(或类似的):GRANT SELECT ON test.user TO 'username'@'%', 则在使用REVOKE SELECT ON *.* FROM 'username'@'%';命令并不能撤销该用户对test数据库中user表的SELECT 操作.相反,如果授权使用的是GRANT SELECT ON *.* TO 'username'@'%';则REVOKE SELECT ON test.user FROM 'username'@'%';命令也不能撤销该用户对test数据库中user表的Select 权限.


具体信息可以用命令SHOW GRANTS FOR 'username'@'%'; 查看.


五.删除用户


命令: DROP USER 'username'@'host';


附表:在MySQL中的操作权限


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 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 has SELECT privileges.


PROCESS


Allows use of SHOW FULL PROCESSLIST.


RELOAD


Allows use of FLUSH.


REPLICATION


Allows the user to ask where slave or master


CLIENT


servers are.


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 are reached.


UPDATE


Allows use of UPDATE.


USAGE


Allows connection without any specific privileges.








MySql中添加用户,新建数据库,用户授权,删除用户,修改密码
查看已有用户：
select user,host,password from mysql.user;


1.新建用户。
//登录MYSQL
@>mysql -u root -p
@>密码
//创建用户
mysql> mysql> insert into mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_sub
ject) values("localhost","phplamp",password("1234"),'','','');
这样就创建了一个名为：phplamp 密码为：1234 的用户。
然后登录一下。
mysql>exit;
@>mysql -u phplamp -p
@>输入密码
mysql>登录成功
2.为用户授权。
//登录MYSQL（有ROOT权限）。我里我以ROOT身份登录.
@>mysql -u root -p
@>密码
//首先为用户创建一个数据库(phplampDB)
mysql>create database phplampDB;
//授权phplamp用户拥有phplamp数据库的所有权限。
>grant all privileges on phplampDB.* to phplamp@localhost identified by '1234';
//刷新系统权限表
mysql>flush privileges;
mysql>其它操作
/*
如果想指定部分权限给一用户，可以这样来写:
mysql>grant select,update on phplampDB.* to phplamp@localhost identified by '1234';
//刷新系统权限表。
mysql>flush privileges;
*/
3.删除用户。
@>mysql -u root -p
@>密码
mysql>Delete FROM user Where User="phplamp" and Host="localhost";
mysql>flush privileges;
//删除用户的数据库
mysql>drop database phplampDB;
4.修改指定用户密码。
@>mysql -u root -p
@>密码
mysql>update mysql.user set password=password('新密码') where User="phplamp" and Host="localhost";
mysql>flush privileges;
5.列出所有数据库
mysql>show database;
6.切换数据库
mysql>use '数据库名';
7.列出所有表
mysql>show tables;
8.显示数据表结构
mysql>describe 表名;
9.删除数据库和数据表
mysql>drop database 数据库名;


注意，如果数据库名包含“.”，那么在删除时需要加上引用引号，如


dropo database `php.sql`;

mysql>drop table 数据表名;

转载自http://dingding830106.blog.163.com/blog/static/35119170201121791232504/