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第二十一天培训笔记

第二十一天培训笔记
上午
1 、环境准备
2 、安装 mysql 绿包
3 、配置 mysql 工作环境
mysql -hip 地址 -p3306 -uroot -p (远程连接使用)
4 mysql 基础命令
1 )修改密码
2 )授权远程登录
3 )刷新
4 )查看表结构
5 )查看用户与主机关系
5 mysql 操作命令
1 )创建 li 用户
9 )查看表内容
下午
1 、脚本安装 mysql
2 mysql 命令回顾
1)远程登录前提条件是 mysql.user 表中的 host 属性为 % ,如果是 localhost 就不允许远程登录,
3 mysql 用户权限设置
1 )创建 lilaosi 用户
mysql> create user 'lilaosi'@'%' identified by 'Lilaosi@123456'; // 添加
lilaosi 账号
2 )修改密码
mysql> alter user 'lilaosi'@'%' identified by 'Lilaosi@123456'; // 修改密码
4 、命令练习
1 )创建三个账号, abc[abcd] ccc[a1b2c3],ddd[231343]
mysql> create user 'abc'@'%' identified by 'abcd';
Query OK, 0 rows affected (0.00 sec)
mysql> create user 'ccc'@'%' identified by 'a1b2c3';
Query OK, 0 rows affected (0.01 sec)
mysql> create user 'ddd'@'%' identified by '231343';
Query OK, 0 rows affected (0.00 sec)
mysql> select host,user from mysql.user;
+-----------+------------------+
| host | user |
+-----------+------------------+
| % | aaa |
| % | abc |
| % | ccc |
| % | ddd |
| % | li |
| % | lilaosi |
| % | root |
| localhost | mysql.infoschema |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+------------------+
11 rows in set (0.00 sec)
2 )删除用户 lilaosi
删除 lilaosi 用户
mysql> drop user 'lilaosi';
Query OK, 0 rows affected (0.02 sec)
mysql> select host,user from mysql.user;
+-----------+------------------+
| host | user |
+-----------+------------------+
| % | aaa |
| % | abc |
| % | ccc |
| % | ddd |
| % | li |
| % | root |
| localhost | mysql.infoschema |
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
+-----------+------------------+
10 rows in set (0.00 sec)
3 aaa ccc ddd 三个账户的密码修改为 123
mysql> alter user 'aaa'@'%' identified by '123';
Query OK, 0 rows affected (0.00 sec)
mysql> alter user 'ccc'@'%' identified by '123';
Query OK, 0 rows affected (0.00 sec)
mysql> alter user 'ddd'@'%' identified by '123';
Query OK, 0 rows affected (0.01 sec)
4 )权限添加练习
1 )添加 aaa 账户,设置密码 aaaa
mysql> create user 'aaa'@'%' identified by 'aaaa';
Query OK, 0 rows affected (0.01 sec)
2 )使用 aaa 账户访问 mysql 服务
[root@mysql ~]# mysql -uaaa -paaaa
3 )查看 test 数据库发现没有权限
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| performance_schema |
+--------------------+
2 rows in set (0.00 sec)
4 )退出并使用 root 账户登录
mysql> quit
Bye
[root@mysql ~]# mysql -uroot -pRoot@123456
5 )为 aaa 账户添加查看 test.user 表的权限
mysql> grant select on test.user to 'aaa';
Query OK, 0 rows affected (0.00 sec)
6 )退出 root ,使用 aaa 账户登录
mysql> quit
Bye
[root@mysql ~]# mysql -uaaa -paaaa
7 )查看数据库,查看表,查看表内容,能够正常查看
14 )为 aaa 用户一次性添加 delect update 权限
mysql> grant delete,update on test.user to 'aaa';
Query OK, 0 rows affected (0.00 sec)
mysql> show grants for 'aaa';
+--------------------------------------------------------------------+
| Grants for aaa@% |
+--------------------------------------------------------------------+
| GRANT USAGE ON *.* TO `aaa`@`%` |
| GRANT SELECT, INSERT, UPDATE, DELETE ON `test`.`user` TO `aaa`@`%` |
+--------------------------------------------------------------------+
2 rows in set (0.00 sec)
6 、权限角色
1 )创建角色
mysql> create role 'jingli'; // 创建 jingli 角色
Query OK, 0 rows affected (0.00 sec)
mysql> create role 'yuangong'; // 创建 yonghu 角色
Query OK, 0 rows affected (0.00 sec)
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