小编给大家分享一下如何查看MySQL数据库中所有用户及拥有权限，希望大家阅读完这篇文章之后都有所收获，下面让我们一起去探讨吧！

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查看MYSQL数据库中所有用户

mysql> SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;
+---------------------------------------+
| query                                 |
+---------------------------------------+
| User: 'cactiuser'@'%';                |
| User: 'common_user'@'%';              |
| User: 'dba'@'%';                      |
| User: 'root'@'%';                     |
| User: 'slave'@'%';                    |
| User: 'wtgame'@'%';                   |
| User: 'root'@'127.0.0.1';             |
| User: 'webman'@'127.0.0.1';           |
| User: 'root'@'192.168.166.200';       |
| User: 'cactiuser'@'192.168.166.202';  |
| User: 'root'@'192.168.166.202';       |
| User: ''@'localhost';                 |
| User: 'cacti'@'localhost';            |
| User: 'cactiuser'@'localhost';        |
| User: 'dba'@'localhost';              |
| User: 'extmail'@'localhost';          |
| User: 'javauser'@'localhost';         |
| User: 'root'@'localhost';             |
| User: 'webman'@'localhost';           |
| User: ''@'localhost.localdomain';     |
| User: 'root'@'localhost.localdomain'; |
+---------------------------------------+
21 rows in set (0.01 sec)

查看数据库中具体某个用户的权限
mysql> show grants for 'cactiuser'@'%';   
+-------------------------------------------------------------------------------------------------------------------+
| Grants for cactiuser@%                                                                                            |
+-------------------------------------------------------------------------------------------------------------------+
| GRANT PROCESS, SUPER ON *.* TO 'cactiuser'@'%' IDENTIFIED BY PASSWORD '*DAFF917B80E3314B1ABECBA9DF8785AFD342CE89' |
| GRANT ALL PRIVILEGES ON `cacti`.* TO 'cactiuser'@'%'                                                              |
+-------------------------------------------------------------------------------------------------------------------+
2 rows in set (0.00 sec)

mysql> select * from mysql.user where user='cactiuser' \G  
*************************** 1. row ***************************
                 Host: %
                 User: cactiuser
             Password: *DAFF917B80E3314B1ABECBA9DF8785AFD342CE89
          Select_priv: N
          Insert_priv: N
          Update_priv: N
          Delete_priv: N
          Create_priv: N
            Drop_priv: N
          Reload_priv: N
        Shutdown_priv: N
         Process_priv: Y
            File_priv: N
           Grant_priv: N
      References_priv: N
           Index_priv: N
           Alter_priv: N
         Show_db_priv: N
           Super_priv: Y
Create_tmp_table_priv: N
     Lock_tables_priv: N
         Execute_priv: N
      Repl_slave_priv: N
     Repl_client_priv: N
     Create_view_priv: N
       Show_view_priv: N
  Create_routine_priv: N
   Alter_routine_priv: N
     Create_user_priv: N
           Event_priv: N
         Trigger_priv: N
             ssl_type:
           ssl_cipher:
          x509_issuer:
         x509_subject:
        max_questions: 0
          max_updates: 0
      max_connections: 0
 max_user_connections: 0

查看user表结构　需要具体的项可结合表结构来查询
mysql> desc mysql.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       |       |
******************
******************
+-----------------------+-----------------------------------+------+-----+---------+-------+
39 rows in set (0.00 sec)

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