MySQL查看用户权限命令的两方法:

## **一. 使用MySQL grants**

MySQL grant详细用法见: [mysql grant使用方法](http://yanue.net/post-97.html) :

```mysql
mysql> show grants for username@localhost;
```

实例:

```mysql
mysql> show grants for root@localhost;
+---------------------------------------------------------------------+
| Grants for root@localhost                                           |
+---------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION |
+---------------------------------------------------------------------+
1 row in set (0.01 sec)
```

## **二. 直接通过mysql select查询语句:**

```mysql
mysql> select * from mysql.user where user='test' and host='127.0.0.1' G;
*************************** 1. row ***************************
                  Host: 127.0.0.1
                  User: test
              Password: *EB3C643405D7F53BD4BF7FBA98DCF5641E228833
           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: N
             File_priv: N
            Grant_priv: N
       References_priv: N
            Index_priv: N
            Alter_priv: N
          Show_db_priv: N
            Super_priv: N
 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
Create_tablespace_priv: N
              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 (0.00 sec)
```

可以看到Select_priv,Insert_priv,Update_priv...等为N表示没有权限,该用户权限一目了然.这时可以使用命令

**给用户加权限:**

见 [MYSQL里给用户加权限](http://www.yanue.net/post-97.html)

```mysql
grant all privileges on *.* to 'test'@'127.0.0.1' identified by 'passwd';
flush privileges;
```

**另外:show可以看到很多东西:**

```mysql
show databases;
show tables;
show create database dbname;  // 这个可以看到创建数据库时用到的一些参数。
show create table tablename;   // 可以看到创建表时用到的一些参数
```