查看当前登录用户: select user();  

mysql> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+

查看用户权限:

show grants for root@localhost;

mysql> show grants for root@localhost;
+---------------------------------------------------------------------------------------------------------------+
| Grants for root@localhost                                                                                     |
+---------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '412e395b04f7020e' WITH GRANT OPTION |
+---------------------------------------------------------------------------------------------------------------+

show grants for [email protected]; // 通过本地IP查看

show create database dbname; // 这个可以看到创建数据库时用到的一些参数。

mysql> show create database testvp09;
+----------+---------------------------------------------------------------------+
| Database | Create Database                                                     |
+----------+---------------------------------------------------------------------+
| testvp09 | CREATE DATABASE `testvp09` /*!40100 DEFAULT CHARACTER SET latin1 */ |
+----------+---------------------------------------------------------------------+

show create table tickets; // 查看表 tickets 的结构

先写到这里吧，工作了，都在这里我也是抄袭的

http://blog.csdn.net/shellching/article/details/8084733