mysql创建用户一般有两种方式，
1、通过命令创建用户并赋予权限
2、直接在mysql的数据字典中添加用户和权限。
建议通过命令的方式进行创建
下面的方法通过命令的方式进行：
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 'dog'@'localhost' IDENTIFIED BY '123456';
CREATE USER 'itlife365'@'192.168.1.101_' IDENDIFIED BY '123456';
CREATE USER 'itlife365'@'%' IDENTIFIED BY '123456';
CREATE USER 'itlife365'@'%' IDENTIFIED BY '';
CREATE USER 'itlife365'@'%';
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.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 'itlife365'@'%';
GRANT ALL ON *.* TO 'itlife365'@'%';
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 'itlife365'@'%' = 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 'itlife365'@'%';
注意: 假如你在给用户'itlife365'@'%'授权的时候是这样的(或类似的):GRANT SELECT ON test.user TO 'itlife365'@'%', 则在使用REVOKE SELECT ON *.* FROM 'itlife365'@'%';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 'itlife365'@'%';则REVOKE SELECT ON test.user FROM 'itlife365'@'%';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 'itlife365'@'%'; 查看.
五.删除用户
命令: DROP USER 'username'@'host';
创建用户：
mysql> create user itlife365@localhost identified by 123456
-> ;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id: 2
Current database: *** NONE ***
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '12345
6' at line 1
mysql> create user itlife365@localhost identified by 123456;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '12345
6' at line 1
mysql> create user itlife365@localhost identified by '123456';
Query OK, 0 rows affected (0.02 sec)
mysql>
使用新的用户登录
D:\mysoft\APMServ5.2.6\MySQL5.1\bin>mysql -uitlife365 -p123456
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.1.28-rc-community MySQL Community Server (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql>
mysql create users and assign the permissions
1、通过命令创建用户并赋予权限
2、直接在mysql的数据字典中添加用户和权限。
建议通过命令的方式进行创建
下面的方法通过命令的方式进行：
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 'dog'@'localhost' IDENTIFIED BY '123456';
CREATE USER 'itlife365'@'192.168.1.101_' IDENDIFIED BY '123456';
CREATE USER 'itlife365'@'%' IDENTIFIED BY '123456';
CREATE USER 'itlife365'@'%' IDENTIFIED BY '';
CREATE USER 'itlife365'@'%';
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.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 'itlife365'@'%';
GRANT ALL ON *.* TO 'itlife365'@'%';
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 'itlife365'@'%' = 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 'itlife365'@'%';
注意: 假如你在给用户'itlife365'@'%'授权的时候是这样的(或类似的):GRANT SELECT ON test.user TO 'itlife365'@'%', 则在使用REVOKE SELECT ON *.* FROM 'itlife365'@'%';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 'itlife365'@'%';则REVOKE SELECT ON test.user FROM 'itlife365'@'%';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 'itlife365'@'%'; 查看.
五.删除用户
命令: DROP USER 'username'@'host';
创建用户：
mysql> create user itlife365@localhost identified by 123456
-> ;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id: 2
Current database: *** NONE ***
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '12345
6' at line 1
mysql> create user itlife365@localhost identified by 123456;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near '12345
6' at line 1
mysql> create user itlife365@localhost identified by '123456';
Query OK, 0 rows affected (0.02 sec)
mysql>
使用新的用户登录
D:\mysoft\APMServ5.2.6\MySQL5.1\bin>mysql -uitlife365 -p123456
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.1.28-rc-community MySQL Community Server (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql>
mysql create users and assign the permissions
