MySQL下查看用戶、建立用戶、刪除用戶

啓動數據庫：

[root@server ~]# mysqld_safe &
[1] 3289
[root@server ~]# 130913 08:19:58 mysqld_safe Logging to '/usr/local/mysql/data/server.gao.err'.
130913 08:19:58 mysqld_safe Starting mysqld daemon with databases from /usr/local/mysql/data

連接到數據庫：

[root@server ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.13 MySQL Community Server (GPL)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> 

查看數據庫列表：

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)

mysql> 

查看用戶狀態：

mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select host,user from mysql.user;
+------------+------+
| host       | user |
+------------+------+
| 127.0.0.1  | root |
| ::1        | root |
| localhost  |      |
| localhost  | root |
| server.gao |      |
| server.gao | root |
+------------+------+
6 rows in set (0.00 sec)

mysql> 

創建用戶:

mysql> create user 'usrabc'@'%' identified by 'usrabc';
Query OK, 0 rows affected (0.00 sec)

mysql> select host,user from mysql.user;
+------------+--------+
| host       | user   |
+------------+--------+
| %          | usrabc |
| 127.0.0.1  | root   |
| ::1        | root   |
| localhost  |        |
| localhost  | root   |
| server.gao |        |
| server.gao | root   |
+------------+--------+
7 rows in set (0.00 sec)

mysql> 

 刪除用戶：

@>mysql -u root -p

　　@>密碼

 　　mysql>Delete FROM user Where User='test' and Host='localhost';

 　　mysql>flush privileges;

 　　mysql>drop database testDB; //刪除用戶的數據庫

刪除賬戶及權限：>drop user 用戶名@'%';

　　　　　　　　>drop user 用戶名@ localhost; 

修改指定用戶密碼：

@>mysql -u root -p

  　　@>密碼

  　　mysql>update mysql.user set password=password('新密碼') where User="test" and Host="localhost";

  　　mysql>flush privileges;