查询：
show databases;
show status;
show tables;
desc table-name；
更改root密码：
方法一：mysqladmin -uroot -poldpassword password
newpassword
方法二：
mysql -uroot -p
use mysql
update user set
password=password("newpasswd") where user="root";
select
host,user,password from
user;
+-----------+------------------+-------------------------------------------+
|
host |
user |
password
|
+-----------+------------------+-------------------------------------------+
|
localhost |
root |
*FAE22ED156CC483651E55164E12EE8597A798849 |
|
c600 |
root |
*FAE22ED156CC483651E55164E12EE8597A798849 |
| 127.0.0.1 |
root |
*FAE22ED156CC483651E55164E12EE8597A798849 |
|
::1 |
root |
*FAE22ED156CC483651E55164E12EE8597A798849 |
| localhost | debian-sys-maint |
*BF673A86346B2E5CFFEFA24D36E2C520F0B82A49 |
| localhost |
test |
*94BDCEBE19083CE2A1F959FD02F964C7AF4CFC29
|
+-----------+------------------+-------------------------------------------+
创建/授权用户：
grant
select ,delete,update,insert,drop on db_name.* to user_name identified by
"passwd" ;
grant all on db_name to user_name ;