1. 安装mysql

2. 在偏好设置中启动 mysql 服务

3. 打开终端 输入 mysql ， 会发现

chenhong:~ chenhong$ mysql
-bash: mysql: command not found

4. 设置mysql 命令，输入

1)alias mysql=/usr/local/mysql/bin/mysql

2)alias mysqladmin=/usr/local/mysql/bin/mysqladmin

再次输入 mysql 命令会发现

chenhong:~ chenhong$ mysql
-bash: mysql: command not found
chenhong:~ chenhong$ alias mysql=/usr/local/mysql/bin/mysql
chenhong:~ chenhong$ alias mysqladmin=/usr/local/mysql/bin/mysqladmin
chenhong:~ chenhong$ mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 36
Server version: 5.1.63-log MySQL Community Server (GPL)

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> 

5. 使用数据库 , 出现 mysql Access denied for user root@localhost错误

mysql Access denied for user root@localhost错误

$ mysql -u root -p

然后控制台会提示你输入密码

chenhong:~ chenhong$ mysql -u root -p
Enter password: 

输入密码后,就可以使用数据库

mysql> use micro_message
Database changed