1.通過mysql數據庫的user表查看用戶相關信息

mysql> use mysql;

mysql> select host,user from user;

查看用戶相關信息

2.創建數據庫

mysql> create database [databasename] default character set utf8 collate utf8_general_ci;

3.創建新用戶

mysql> create user 'userName'@'%' identified by 'passwr';

語法：

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

例子:

CREATE USER 'dog'@'localhost' IDENTIFIED BY '123456';

CREATE USER 'pig'@'192.168.1.101_' IDENDIFIED BY '123456';

CREATE USER 'pig'@'%' IDENTIFIED BY '123456';

CREATE USER 'pig'@'%' IDENTIFIED BY '';

CREATE USER 'pig'@'%';

user表中host列的值的意義

% 匹配所有主機

localhost localhost不會被解析成IP地址，直接通過UNIXsocket連接

127.0.0.1 會通過TCP/IP協議連接，并且只能在本機訪問；

::1 ::1就是兼容支持ipv6的，表示同ipv4的127.0.0.1

4.對userName用戶給予針對指定數據庫進行增刪改查的權限

mysql> grant select,insert,update,delete,create on

[databasename].* to 'userName';

flush privileges;

注意：修改完權限以后 一定要刷新服務，或者重啟服務，刷新服務用：FLUSH PRIVILEGES

5.通過show grants命令查看權限，若想要在原來的基礎上增加權限則繼續執行grant

mysql> grant drop on [databasename].* to 'userName';

Query OK, 0 rows affected (0.00 sec)

mysql> show grants for 'userName';

+----------------------------------------------------------------------------------------------------+

| Grants for 'userName'@% |

+----------------------------------------------------------------------------------------------------+

| GRANT USAGE ON . TO 'userName'@'%' IDENTIFIED BY PASSWORD '*****************************************' |

| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP ON [databasename].* TO 'userName'@'%' |

+----------------------------------------------------------------------------------------------------+

6.通過revoke命令移除用戶的相關權限

mysql> revoke drop on [databasename].* from 'userName';

mysql> show grants for 'userName';

+----------------------------------------------------------------------------------------------------+

| Grants for 'userName'@% |

+----------------------------------------------------------------------------------------------------+

| GRANT USAGE ON . TO 'userName'@'%' IDENTIFIED BY PASSWORD '*****************************************' |

| GRANT SELECT, INSERT, UPDATE, DELETE, CREATE ON [databasename].* TO 'userName'@'%' |

+----------------------------------------------------------------------------------------------------+

7.修改用戶密碼

mysql>update mysql.user set password=password('新密碼') where User="demo" and Host="localhost";

mysql>flush privileges;

8.刪除用戶

mysql>Delete FROM user Where User='demo' and Host='localhost';

mysql>flush privileges;

mysql>drop database demoDB; //刪除用戶的數據庫

刪除賬戶及權限：>drop user 用戶名@'%';

>drop user 用戶名@ localhost;

參考

總結

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