//mySQLに新しいアカウントを作ってデータベースを設計するまで

//rootで一度ログインしてchatというアカウントを作る
mysql> grant all privileges on *.* to chat@localhost identified by 'chat';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT host,user from mysql.user;
+-----------+------------------+
| host      | user             |
+-----------+------------------+
| %         | chat             |
| 127.0.0.1 | root             |
| ::1       | root             |
| localhost |                  |
| localhost | chat             |
| localhost | debian-sys-maint |
| localhost | root             |
| ubuntu    |                  |
| ubuntu    | root             |
+-----------+------------------+
9 rows in set (0.00 sec)

saki@ubuntu:~/test/chat$ mysql -u chat -pchat
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 42
Server version: 5.5.24-0ubuntu0.12.04.1 (Ubuntu)

Copyright (c) 2000, 2011, 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> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.10 sec)

mysql> create database chat default character set utf8;
Query OK, 1 row affected (0.01 sec)

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

mysql> use chat
Database changed

mysql> create table messages( 
  id int primary key auto_increment,
  text char(140) not null,
  time datetime)engine=innodb;