字符集調整 查看 clear .html resp mark ner auth 一個

13.1 設置更改root密碼
13.2 連接mysql
13.3 mysql常用命令
13.4 mysql用戶管理
13.5 常用sql語句
13.6 mysql數據庫備份恢復
使用xtrabackup備份innodb引擎的數據庫 innobackupex 備份 Xtrabackup 增量備份 http://zhangguangzhi.top/2017/08/23/innobackex%E5%B7%A5%E5%85%B7%E5%A4%87%E4%BB%BDmysql%E6%95%B0%E6%8D%AE/#%E4%B8%89%E3%80%81%E5%BC%80%E5%A7%8B%E6%81%A2%E5%A4%8Dmysql
相關視頻
鏈接：http://pan.baidu.com/s/1miFpS9M 密碼：86dx
鏈接：http://pan.baidu.com/s/1o7GXBBW 密碼：ue2f

擴展
mysql5.7 root密碼更改 http://www.apelearn.com/bbs/thread-7289-1-1.html
myisam 和innodb引擎對比 http://www.pureweber.com/article/myisam-vs-innodb/
mysql 配置詳解： http://blog.linuxeye.com/379.html
mysql調優： http://www.aminglinux.com/bbs/thread-5758-1-1.html
同學分享的親身mysql調優經歷： http://www.apelearn.com/bbs/thread-11281-1-1.html
SQL語句教程 http://www.runoob.com/sql/sql-tutorial.html
什麽是事務？事務的特性有哪些？ http://blog.csdn.net/yenange/article/details/7556094

根據binlog恢復指定時間段的數據 https://blog.csdn.net/lilongsy/article/details/74726002
mysql字符集調整 http://xjsunjie.blog.51cto.com/999372/1355013

root 是MySQL的超級管理員用戶 和Linux系統的root管理員類似

同時也要區分這個root和系統的用戶不是一個用戶，當然也可以創建普通用戶連接MySQL

默認root 的MySQL用戶密碼是空的，所以我們為了安全需要設置一個密碼

先看MySQL有沒有啟動 ，如果沒啟動先啟動起來

[root@linux-001 src]# ps aux |grep mysql

[root@linux-001 mysql]# /etc/init.d/mysqld start

Starting MySQL SUCCESS!

開始啟動時候我報了個錯

Starting MySQL. ERROR! The server quit without updating PID file (/data/mysql/linux-001.pid).

我就看配置文件和啟動文件最終

[root@linux-001 mysql]# vi /etc/init.d/mysqld

mysqld_pid_file_path=/data/mysql/

定義後就可以正常啟動了

[root@linux-001 mysql]# ls /usr/local/mysql/bin/mysql

/usr/local/mysql/bin/mysql

[root@linux-001 mysql]# echo $PATH

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin

要想讓他加到環境變量

export PATH=/usr/local/mysql/bin:$PATH

[root@mysql mysql]# mysql -uroot

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql>

給root用戶設密碼

[root@mysql mysql]# mysqladmin -uroot password ‘123456‘

Warning: Using a password on the command line interface can be insecure.

重啟

[root@mysql mysql]# /etc/init.d/mysqld restart

Shutting down MySQL.. SUCCESS!

Starting MySQL... SUCCESS!

[root@mysql mysql]# mysql -uroot 不加密碼阻止進入了

ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)

[root@mysql mysql]# mysql -uroot -p 加-p輸入密碼

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql>

有的時候需要更改已知的mysql密碼

[root@mysql mysql]# mysqladmin -uroot -p‘123456‘ password ‘Aa123456‘

Warning: Using a password on the command line interface can be insecure.

[root@mysql mysql]# mysql -uroot -p 要輸入新的密碼Aa123456

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 4

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

在mysql的使用過程中也可能會碰到mysql密碼被遺忘的情況

[root@mysql mysql]# vim /etc/my.cnf

[mysqld]

skip-grant-tables

[root@mysql mysql]# /etc/init.d/mysqld restart 重啟

Shutting down MySQL.. SUCCESS!

Starting MySQL.. SUCCESS!

[root@mysql mysql]# mysql -uroot 不用密碼也可以登錄

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 1

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

//mysql的用戶密碼存在mysql數據庫的user表中

mysql> show databases;

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

| Database |

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

| information_schema |

| mysql |

| performance_schema |

| test |

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

4 rows in set (0.01 sec)

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> desc user;

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

| Field | Type | Null | Key | Default | Extra |

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

| Host | char(60) | NO | PRI | | |

| User | char(16) | NO | PRI | | |

| Password | char(41) | NO | | | |

| Select_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Insert_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Update_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Delete_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Drop_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Reload_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Shutdown_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Process_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| File_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Grant_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| References_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Index_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Alter_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Show_db_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Super_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_tmp_table_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Lock_tables_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Execute_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Repl_slave_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Repl_client_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_view_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Show_view_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_routine_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Alter_routine_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_user_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Event_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Trigger_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_tablespace_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| ssl_type | enum(‘‘,‘ANY‘,‘X509‘,‘SPECIFIED‘) | NO | | | |

| ssl_cipher | blob | NO | | NULL | |

| x509_issuer | blob | NO | | NULL | |

| x509_subject | blob | NO | | NULL | |

| max_questions | int(11) unsigned | NO | | 0 | |

| max_updates | int(11) unsigned | NO | | 0 | |

| max_connections | int(11) unsigned | NO | | 0 | |

| max_user_connections | int(11) unsigned | NO | | 0 | |

| plugin | char(64) | YES | | mysql_native_password | |

| authentication_string | text | YES | | NULL | |

| password_expired | enum(‘N‘,‘Y‘) | NO | | N | |

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

43 rows in set (0.00 sec)

mysql> select user,password from user where user=‘root‘;

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

| user | password |

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

| root | *4A488726AE5A0B0F0DB967998EE12D87F25C9610 |

| root | |

| root | |

| root | |

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

4 rows in set (0.01 sec)

mysql> update user set password=password(‘123456‘) where user=‘root‘; //更新密碼為123456

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)

mysql> exit

Bye

//刪除my.conf中的skip-grant

[root@mysql mysql]# vim /etc/my.cnf

[root@mysql mysql]# /etc/init.d/mysqld restart

Shutting down MySQL.. SUCCESS!

Starting MySQL.. SUCCESS!

[root@mysql mysql]# mysql -uroot

ERROR 1045 (28000): Access denied for user ‘root‘@‘localhost‘ (using password: NO)

[root@mysql mysql]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 2

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql>

mysql -uroot -p123456

mysql -uroot -p123456 -h127.0.0.1 -P3306

mysql -uroot -p123456 -S/tmp/mysql.sock

mysql -uroot -p123456 -e “show databases”

mysql主要有4種連接方式

1.mysql -uroot -p123456

[root@mysql mysql]# mysql -uroot -p‘123456‘

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 7

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> quit

Bye

2.mysql -uroot -p123456 -h127.0.0.1 -P3306

//ip和端口連接方式

[root@mysql mysql]# netstat -ntlup | grep :3306

tcp6 0 0 :::3306 :::* LISTEN 13870/mysqld

[root@mysql mysql]# mysql -uroot -p‘123456‘ -h 127.0.0.1 -P 3306

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 8

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> quit

Bye

3.mysql -uroot -p123456 -S/tmp/mysql.sock

//socket方式，其實與第一種是一樣的 [root@mysql mysql]# ps aux | grep mysql | grep socket

mysql 13870 0.1 44.6 1302936 450260 pts/1 Sl 14:36 0:08 /usr/local/mysql/bin/mysqld --basedir=/usr/local/mysql --datadir=/data/mysql --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=mysql.err --pid-file=/data/mysql/mysql.pid --socket=/tmp/mysql.sock

[root@mysql mysql]# mysql -uroot -p‘123456‘ -S ‘/tmp/mysql.sock‘

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 9

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> quit

Bye

4.mysql -uroot -p123456 -e sql_command

//這種方式可以直接在命令行上執行sql查詢，可以用在bash腳本的編寫中

[root@mysql mysql]# mysql -uroot -p‘123456‘ -e ‘select user,password from mysql.user‘

Warning: Using a password on the command line interface can be insecure.

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

| user | password |

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

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| | |

| | |

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

查詢庫 show databases;

切換庫 use mysql;

查看庫裏的表 show tables;

查看表裏的字段 desc tb_name;

查看建表語句 show create table tb_name\G;

查看當前用戶 select user();

查看當前使用的數據庫 select databsase();

創建庫 create database db1;

創建表 use db1; create table t1(`id` int(4), `name` char(40));

查看當前數據庫版本 select version();

查看數據庫狀態 show status;

查看各參數 show variables; show variables like ‘max_connect%‘;

修改參數 set global max_connect_errors=1000;

查看隊列 show processlist; show full processlist;

[root@mysql mysql]# mysql -uroot -p‘123456‘

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 11

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> show databases;

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

| Database |

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

| information_schema |

| mysql |

| performance_schema |

| test |

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

4 rows in set (0.01 sec)

mysql> use mysql //切換庫，切換庫結尾可以不帶;號

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

查看數據庫的表

mysql> show tables;

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

| Tables_in_mysql |

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

| columns_priv |

| db |

| event |

| func |

| general_log |

| help_category |

| help_keyword |

| help_relation |

| help_topic |

| innodb_index_stats |

| innodb_table_stats |

| ndb_binlog_index |

| plugin |

| proc |

| procs_priv |

| proxies_priv |

| servers |

| slave_master_info |

| slave_relay_log_info |

| slave_worker_info |

| slow_log |

| tables_priv |

| time_zone |

| time_zone_leap_second |

| time_zone_name |

| time_zone_transition |

| time_zone_transition_type |

| user |

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

28 rows in set (0.00 sec)

查看表的結構

mysql> desc user;

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

| Field | Type | Null | Key | Default | Extra |

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

| Host | char(60) | NO | PRI | | |

| User | char(16) | NO | PRI | | |

| Password | char(41) | NO | | | |

| Select_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Insert_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Update_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Delete_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Drop_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Reload_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Shutdown_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Process_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| File_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Grant_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| References_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Index_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Alter_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Show_db_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Super_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_tmp_table_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Lock_tables_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Execute_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Repl_slave_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Repl_client_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_view_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Show_view_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_routine_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Alter_routine_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_user_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Event_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Trigger_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| Create_tablespace_priv | enum(‘N‘,‘Y‘) | NO | | N | |

| ssl_type | enum(‘‘,‘ANY‘,‘X509‘,‘SPECIFIED‘) | NO | | | |

| ssl_cipher | blob | NO | | NULL | |

| x509_issuer | blob | NO | | NULL | |

| x509_subject | blob | NO | | NULL | |

| max_questions | int(11) unsigned | NO | | 0 | |

| max_updates | int(11) unsigned | NO | | 0 | |

| max_connections | int(11) unsigned | NO | | 0 | |

| max_user_connections | int(11) unsigned | NO | | 0 | |

| plugin | char(64) | YES | | mysql_native_password | |

| authentication_string | text | YES | | NULL | |

| password_expired | enum(‘N‘,‘Y‘) | NO | | N | |

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

43 rows in set (0.01 sec)

創建數據庫

mysql> create database dbtest;

Query OK, 1 row affected (0.00 sec)

創建在數據庫中創建表

//註意是反引號 一定記得是反引號

mysql> create table tb1(`id` int(4),`name` char(40));

Query OK, 0 rows affected (0.03 sec)

查看建表語句

// \G代表橫向顯示 //如需建表時設定字符集，可以在create table語句後加上‘ENGINE=InnoDB DEFAULT CHARSET=utf8’，utf-8替換為相應的字符集

mysql> show create table tb1\G

*************************** 1. row ***************************

Table: tb1

Create Table: CREATE TABLE `tb1` (

`id` int(4) DEFAULT NULL,

`name` char(40) DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=latin1

1 row in set (0.00 sec)

查看當前用戶

mysql> select user();

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

| user() |

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

| root@localhost |

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

1 row in set (0.00 sec)

查看當前數據庫

Database changed mysql> select database(); +------------+ | database() | +------------+ | mysql | +------------+ 1 row in set (0.01 sec)

查看數據庫版本

mysql> select version(); +-----------+ | version() | +-----------+ | 5.6.36 | +-----------+ 1 row in set (0.00 sec)

查看數據庫狀態

mysql> show status;

查看數據庫參數

mysql> show variables\G

查看具體的數據庫參數

//%號和like結合使用，%是通配符

mysql> show variables like ‘max_connect%‘;

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

| Variable_name | Value |

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

| max_connect_errors | 100 |

| max_connections | 151 |

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

2 rows in set (0.00 sec)

臨時設定參數

mysql> set global max_connect_errors=1000; Query OK, 0 rows affected (0.02 sec) mysql> show variables like ‘max_connect%‘; +--------------------+-------+ | Variable_name | Value | +--------------------+-------+ | max_connect_errors | 1000 | | max_connections | 151 | +--------------------+-------+ 2 rows in set (0.00 sec)

//退出後重啟mysql服務，參數失效 mysql> quit Bye

[root@mysql mysql]# /etc/init.d/mysqld restart

Shutting down MySQL.. SUCCESS!

[root@mysql mysql]# mysql -uroot -p‘123456‘

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> show variables like ‘max_connect%‘;

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

| Variable_name | Value |

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

| max_connect_errors | 100 |

| max_connections | 151 |

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

2 rows in set (0.00 sec)

永久修改參數值

root@mysql mysql]# vim /etc/my.cnf

//在[mysqld]下添加相應的參數 max_connect_errors=1000

[root@mysql mysql]# /etc/init.d/mysqld restart

[root@mysql mysql]# mysql -uroot -p‘123456‘

mysql> show variables like ‘max_connect%‘;

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

| Variable_name | Value |

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

| max_connect_errors | 1000 |

| max_connections | 151 |

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

2 rows in set (0.00 sec)

grant all on *.* to ‘user1‘ identified by ‘passwd‘;

grant SELECT,UPDATE,INSERT on db1.* to ‘user2‘@‘192.168.133.1‘ identified by ‘passwd‘;

grant all on db1.* to ‘user3‘@‘%‘ identified by ‘passwd‘;

show grants;

show grants for [email protected];

mysql安裝完以後默認只有一個root管理用戶，最高權限。不利於安全管理。需要根據需要創建不同用戶。

//創建用戶並授予全部權限

[root@mysql mysql]# mysql -uroot -p‘123456‘

mysql> grant all on *.* to ‘user01‘ identified by ‘123456‘;

Query OK, 0 rows affected (0.00 sec)

[root@mysql mysql]# mysql -uuser01 -p

Enter password:

ERROR 1045 (28000): Access denied for user ‘user01‘@‘localhost‘ (using password: YES)

//系統中存在空帳戶導致，刪除多余空帳戶

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 from user;

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

| User | Password |

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

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| root | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

| | |

| | |

| user1 | *59C70DA2F3E3A5BDF46B68F5C8B8F25762BCCEF0 |

| user2 | *59C70DA2F3E3A5BDF46B68F5C8B8F25762BCCEF0 |

| user3 | *59C70DA2F3E3A5BDF46B68F5C8B8F25762BCCEF0 |

| user01 | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |

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

10 rows in set (0.00 sec)

mysql> delete from user where user=‘‘;

Query OK, 2 rows affected (0.00 sec)

//該句一定要執行 mysql> FLUSH PRIVILEGES; mysql> exit

[root@mysql mysql]# mysql -u user01 -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 15

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

//授予部分權限 //授予user08用戶mysql數據庫，user表查詢，更新和插入的權限

[root@mysql mysql]# mysql -uroot -p‘123456‘

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 16

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> grant SELECT,UPDATE,INSERT on mysql.user to ‘user08‘ identified by ‘123456‘;

Query OK, 0 rows affected (0.01 sec)

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> show database;

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘database‘ at line 1

mysql> show databases;

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

| Database |

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

| information_schema |

| dbtest |

| mysql |

| performance_schema |

| test |

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

5 rows in set (0.00 sec)

//因為對user表有權限，其他表都看不到

mysql> show tables;

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

| Tables_in_mysql |

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

| columns_priv |

| db |

| event |

| func |

| general_log |

| help_category |

| help_keyword |

| help_relation |

| help_topic |

| innodb_index_stats |

| innodb_table_stats |

| ndb_binlog_index |

| plugin |

| proc |

| procs_priv |

| proxies_priv |

| servers |

| slave_master_info |

| slave_relay_log_info |

| slave_worker_info |

| slow_log |

| tables_priv |

| tb1 |

| time_zone |

| time_zone_leap_second |

| time_zone_name |

| time_zone_transition |

| time_zone_transition_type |

| user |

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

29 rows in set (0.00 sec)

//限制可以從哪個ip登錄訪問 //@後的部分可以指定可以訪問的來源，%表示任意地址 //註意@前後的引號

mysql> grant all on *.* to ‘user09‘@‘127.0.0.1‘ identified by ‘123456‘;

Query OK, 0 rows affected (0.00 sec)

mysql> exit

Bye

[root@mysql mysql]# mysql -uuser09 -p -h127.0.0.1

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 17

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> quit

Bye

[root@mysql mysql]# mysql -uuser09 -p -hlocalhost

Enter password:

ERROR 1045 (28000): Access denied for user ‘user09‘@‘localhost‘ (using password: YES)

[root@mysql mysql]# mysql -uuser09 -h192.168.76.135

ERROR 1045 (28000): Access denied for user ‘user09‘@‘192.168.76.135‘ (using password: NO)

[root@mysql mysql]# mysql -uroot -p‘123456‘

mysql> show grants for [email protected];

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

| Grants for [email protected] |

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

| GRANT ALL PRIVILEGES ON *.* TO ‘user09‘@‘127.0.0.1‘ IDENTIFIED BY PASSWORD ‘*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9‘ |

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

1 row in set (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON *.* TO ‘user09‘@‘%‘ IDENTIFIED BY PASSWORD ‘*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9‘;

Query OK, 0 rows affected (0.00 sec)

mysql>

[root@mysql mysql]# mysql -uuser09 -p123456 -h127.0.0.1

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 22

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql>

[root@mysql mysql]# mysql -uuser09 -p123456 -hlocalhost;

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 23

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql>

[root@mysql mysql]# mysql -uuser09 -p123456 -h192.168.76.135

Warning: Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 24

Server version: 5.6.39 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> show grants;

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

| Grants for user09@% |

select count(*) from mysql.user;

select * from mysql.db;

select db from mysql.db;

select db,user from mysql.db;

select * from mysql.db where host like ‘192.168.%‘;

insert into db1.t1 values (1, ‘abc‘);

update db1.t1 set name=‘aaa‘ where id=1;

truncate table db1.t1;

drop table db1.t1;

drop database db1;

二十四節課預習