Centos6.10安装mysql5.6

## 安装MySQL服务
[root@mini1 ~]# yum install mysql-server
## 启动MySQL服务
[root@mini1 ~]# service mysqld start
## 查看MySQL服务进程
[root@mini1 ~]# ps -ef | grep mysqld

## 修改mysql的root密码
[root@mini1 ~]# mysql -uroot
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> update user set password=PASSWORD("123456") where user='root';
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4  Changed: 4  Warnings: 0

mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

## 重新登录
[root@mini1 ~]# mysql -uroot -p
Enter password:123456

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> SELECT User, Password, Host FROM user;
+------+-------------------------------------------+-----------+
| User | Password                                  | Host      |
+------+-------------------------------------------+-----------+
| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 | localhost |
| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 | mini1     |
| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 | 127.0.0.1 |
| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 | ::1       |
|      |                                           | localhost |
|      |                                           | mini1     |
+------+-------------------------------------------+-----------+
6 rows in set (0.00 sec)
## 授权root使用123456密码在任何地址都能连接到该mysql
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
## 授权用户root从ip为192.168.1.11的主机连接到mysql服务器，并使用123456作为密码
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.1.11' IDENTIFIED BY '123456' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql 创建数据库,添加用户,用户授权

---

一、创建mysql数据库

1.创建数据库语法

--创建名称为“testdb”数据库，并设定编码集为utf8
CREATE DATABASE IF NOT EXISTS testdb DEFAULT CHARSET utf8 COLLATE utf8_general_ci;

二、创建用户

1.新建用户

 --创建了一个名为：test 密码为：1234 的用户
 create user 'test'@'localhost' identified by '1234';

注意： 此处的"localhost"，是指该用户只能在本地登录，不能在另外一台机器上远程登录。如果想远程登录的话，将"localhost"改为"%"，表示在任何一台电脑上都可以登录。也可以指定某台机器可以远程登录。

2.查询用户

--查询用户
select user,host from mysql.user;

3.删除用户

--删除用户“test”
drop user test@localhost ;
--若创建的用户允许任何电脑登陆，删除用户如下
drop user test@'%';

4.更改密码

--方法1，密码实时更新；修改用户“test”的密码为“1122”
set password for test =password('1122');
--方法2，需要刷新；修改用户“test”的密码为“1234”
update  mysql.user set  password=password('1234')  where user='test'
--刷新
flush privileges;

5.用户分配权限

--授予用户test通过外网IP对数据库“testdb”的全部权限
grant all privileges on 'testdb'.* to 'test'@'%' identified by '1234';  

--刷新权限
flush privileges; 

--授予用户“test”通过外网IP对于该数据库“testdb”中表的创建、修改、删除权限,以及表数据的增删查改权限
grant create,alter,drop,select,insert,update,delete on testdb.* to test@'%';     

6.查看用户权限

--查看用户“test”
show grants for test;