mysql 添加登录用户
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 hasSELECT 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;