MySQL权限详解

1. 主要权限

2. 查看用户权限

• ​​show grants​​​命令
  这个命令可以用于查看当前回话的所在用户的使用权限。

mysql> show grants;
+---------------------------------------------------------------------+
| Grants for root@localhost                                           |
+---------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION |
| GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION        |
+---------------------------------------------------------------------+
2 rows in set (0.00 sec)

• ​​select * from mysql.user where user='root'\G​​ 这个命令可以通过表的形式展现出指定用户的权限。

mysql> select * from mysql.user where user='root'\G
*************************** 1. row ***************************
                  Host: localhost
                  User: root
           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: *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B
      password_expired: N
 password_last_changed: 2018-09-24 20:40:06
     password_lifetime: NULL
        account_locked: N
*************************** 2. row ***************************
                  Host: %
                  User: root
           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: N
       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: *81F5E21E35407D884A6CD4A731AEBFB6AF209E1B
      password_expired: N
 password_last_changed: 2018-11-21 16:48:43
     password_lifetime: NULL
        account_locked: N
2 rows in set (0.00 sec)

通过上述结果，可以看到本机的 ​​root​​ 用户有两种，一种是 ​​localhost​​ 登录；一种是远程登录。远程登录的除了没有 ​​Grant option​​ 权限之外，具备任何权限。【可以通过表中的值查看 ​​N/Y​​ 】，显示如下：

3. 参考文章

• mysql-refman-5.7.22