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)
mysql> <br>

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