1.通過(guò)mysql數(shù)據(jù)庫(kù)的user表查看用戶相關(guān)信息

mysql> use mysql;

mysql> select host,user from user;

查看用戶相關(guān)信息

2.創(chuàng)建數(shù)據(jù)庫(kù)

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

3.創(chuàng)建新用戶

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

語(yǔ)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(jī)

localhost localhost不會(huì)被解析成IP地址，直接通過(guò)UNIXsocket連接

127.0.0.1 會(huì)通過(guò)TCP/IP協(xié)議連接，并且只能在本機(jī)訪問(wèn)；

::1 ::1就是兼容支持ipv6的，表示同ipv4的127.0.0.1

4.對(duì)userName用戶給予針對(duì)指定數(shù)據(jù)庫(kù)進(jìn)行增刪改查的權(quán)限

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

[databasename].* to 'userName';

flush privileges;

注意：修改完權(quán)限以后 一定要刷新服務(wù)，或者重啟服務(wù)，刷新服務(wù)用：FLUSH PRIVILEGES

5.通過(guò)show grants命令查看權(quán)限，若想要在原來(lái)的基礎(chǔ)上增加權(quán)限則繼續(xù)執(zhí)行g(shù)rant

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(guò)revoke命令移除用戶的相關(guān)權(quán)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(shù)據(jù)庫(kù)

刪除賬戶及權(quán)限：>drop user 用戶名@'%';

>drop user 用戶名@ localhost;

參考

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