MySQL:ERROR 1142(42000)和ERROR 1064(42000)

Question

我正在使用Windows 7.我已经下载mysql-5.5.16-win32.zip并安装了它.我成功启动了MySQL服务器,但是我收到了这个错误:

C:\Program Files\Mysql\bin>mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.5.16 MySQL Community Server (GPL)

mysql> select user, host, password from mysql.user;
ERROR 1142 (42000): SELECT command denied to user ''@'localhost' for table 'user
'
mysql> mysql -u root -p
    -> select user, host, password from mysql.user;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'mysql
 -u root -p
select user, host, password from mysql.user' at line 1
mysql> mysql -u root -p root
    -> select user, host, password from mysql.user;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use near 'mysql
 -u root -p root
select user, host, password from mysql.user' at line 1
mysql>

如何设置从Windows到mysql表用户所需的权限？

Answer 1

mysql命令行错误消息:

ERROR 1142 (42000): SELECT command denied to user ''@'localhost' for table 'user'

表示您使用默认的null用户登录到mysql,该用户的权限几乎为零.

1. 从命令行,像以前一样运行mysql:

   C:\Users\Charity>mysql
   

2. 这将带您进入mysql提示符,运行该命令 select user();

   mysql> select user();
   +----------------+
   | user()         |
   +----------------+
   | ODBC@localhost |
   +----------------+
   1 row in set (0.00 sec)
   

   该输出意味着您不是作为用户连接,而是作为某种非用户API连接器连接.ODBC不在mysql.users表中.当您未指定用户时,用户连接到MySQL.

3. 运行另一个命令:

   mysql> select user from mysql.user;
   ERROR 1142 (42000): SELECT command denied to user ''@'localhost' for 
   table 'user'
   mysql>
   

   我们没有像任何用户那样连接,所以它告诉我们拒绝访问.

4. 运行以下命令:

   C:\Users\Charity>mysql -u this_is_not_a_user
   mysql> select user();
   +------------------------------+
   | user()                       |
   +------------------------------+
   | this_is_not_a_user@localhost |
   +------------------------------+
   1 row in set (0.00 sec)
   
   mysql>
   

   所以我们已经以我们定义的另一个非用户身份登录.您是否希望我们从帽子中取出的用户拥有任何特权？没有.

5. 不要鬼混并以root用户身份登录:

   C:\Users\Charity>mysql -u root -p
   Enter password: **********
   mysql> select user();
   +----------------+
   | user()         |
   +----------------+
   | root@localhost |
   +----------------+
   1 row in set (0.00 sec)
   mysql>
   

   现在你是根,你可以看到一切.

6. 看一下mysql.user表:

   mysql> select user, host from mysql.user;
   +------+-----------+
   | user | host      |
   +------+-----------+
   |      | linux     |
   | root | linux     |
   |      | localhost |
   | pma  | localhost |
   | root | localhost |
   +------+-----------+
   5 rows in set (0.00 sec)
   

   您可能希望创建更多用户,以便您可以让人们使用数据库,而无需授予他们对数据库执行任何操作的权限.让野蛮人远离护城河.

7. 您不希望一直以root用户身份登录.所以创建一个新用户.转到phpmyadmin,以root身份登录到phpadmin.单击"用户"选项卡并创建新用户.将显示一个新对话框,填写用户名,密码和权限.然后您可以以该用户身份登录:

   C:\Users\Charity>mysql -u el -p
   Enter password: **********
   mysql> select user();
   +----------------+
   | user()         |
   +----------------+
   | el@localhost   |
   +----------------+
   1 row in set (0.00 sec)
   mysql>
   

   此用户可以执行您在步骤7中定义的权限中授予的所有内容.