MySQL查询用户权限的方法总结

介绍两种查看MySQL用户权限的两种方法

1、 使用MySQL grants命令

mysql> show grants for username@localhost;

+———————————————————————+

| Grants for root@localhost |

+———————————————————————+

| GRANT ALL PRIVILEGES ON *.* TO ‘root’@’localhost’ WITH GRANT OPTION |

+———————————————————————+

需要注意的是：

● username和ip的组合需要是在mysql.user表中存在的，具体可以通过 select * from mysql.user 命令查看

● ip地址如果是通配符格式需要加引号，例如：show grants for root@’172.%’;

2、 使用MySQL select命令

mysql> select * from mysql.user where user=’root’ and host=’localhost’ \G;

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

Host: localhost

User: root

Password: **********************

Select_priv: Y

Insert_priv: Y

Update_priv: Y

Delete_priv: Y

Create_priv: Y

Drop_priv: Y

Reload_priv: Y

Shutdown_priv: Y

Process_priv: Y

File_priv: Y

Grant_priv: Y

References_priv: Y

Index_priv: Y

Alter_priv: Y

Show_db_priv: Y

Super_priv: Y

Create_tmp_table_priv: Y

Lock_tables_priv: Y

Execute_priv: Y

Repl_slave_priv: Y

Repl_client_priv: Y

Create_view_priv: Y

Show_view_priv: Y

Create_routine_priv: Y

Alter_routine_priv: Y

Create_user_priv: Y

Event_priv: Y

Trigger_priv: Y

Create_tablespace_priv: Y

ssl_type:

ssl_cipher:

x509_issuer:

x509_subject:

max_questions: 0

max_updates: 0

max_connections: 0

max_user_connections: 0

plugin: mysql_native_password

authentication_string:

password_expired: N

1 row in set (0.01 sec)

知识点扩展：

我们来创建一个测试账号test，授予表层级的权限

mysql> drop user test;

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> grant all on MyDB.kkk to test@’%’ identified by ‘test’;

Query OK, 0 rows affected (0.01 sec)

mysql>

mysql> show grants for test;

+—————————————————————————————————–+

| Grants for test@% |

+—————————————————————————————————–+

| GRANT USAGE ON *.* TO ‘test’@’%’ IDENTIFIED BY PASSWORD ‘*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29’ |

| GRANT ALL PRIVILEGES ON `MyDB`.`kkk` TO ‘test’@’%’ |

+—————————————————————————————————–+

2 rows in set (0.00 sec)

mysql> select * from mysql.tables_priv\G;

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

Host: %

Db: MyDB

User: test

Table_name: kkk

Grantor: root@localhost

Timestamp: 0000-00-00 00:00:00

Table_priv: Select,Insert,Update,Delete,Create,Drop,References,Index,Alter,Create View,Show view,Trigger

Column_priv:

1 row in set (0.01 sec)

ERROR:

No query specified

mysql> <br>我们来创建一个测试账号test，授予列层级的权限

mysql> drop user test;

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql> grant select (id, col1) on MyDB.TEST1 to test@’%’ identified by ‘test’;

Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

mysql>

mysql> select * from mysql.columns_priv;

+——+——+——+————+————-+———————+————-+

| Host | Db | User | Table_name | Column_name | Timestamp | Column_priv |

+——+——+——+————+————-+———————+————-+

| % | MyDB | test | TEST1 | id | 0000-00-00 00:00:00 | Select |

| % | MyDB | test | TEST1 | col1 | 0000-00-00 00:00:00 | Select |

+——+——+——+————+————-+———————+————-+

2 rows in set (0.00 sec)

mysql> show grants for test;

+—————————————————————————————————–+

| Grants for test@% |

+—————————————————————————————————–+

| GRANT USAGE ON *.* TO ‘test’@’%’ IDENTIFIED BY PASSWORD ‘*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29’ |

| GRANT SELECT (id, col1) ON `MyDB`.`TEST1` TO ‘test’@’%’ |

+—————————————————————————————————–+

2 rows in set (0.00 sec)

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