Mysql create a database and assign permissions to users

First, create a mysql database

1. Create a database syntax

--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;

 

Second, create a user

1. Create a new user

 --创建了一个名为：test 密码为：1234 的用户
 

create user 'test'@'localhost' identified by '1234';

 

Note:
"localhost" here, means that the user can only log on locally, not remotely log in on another machine. If you want to remote login, it will "localhost" to "%", said can log on from any computer. You can also specify a machine can log in remotely.

2. Query User

--查询用户

select user,host from mysql.user;

 

3. Delete user

--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. Change your password

--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. assign permissions to users

--授予用户通过外网IP对于该数据库“testdb”的全部权限

grant all privileges on 'test'.* 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. View the user permissions

--查看用户“test”

show grants for test;

 

Note: After you modify the permissions must refresh the service, or restart the service, refresh the service with: flush privileges;