从命令行中连接mysql
192:~ sam$ mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.25 MySQL Community Server (GPL)
Copyright (c) 2000, 2015, 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>
以上命令中，mysql代表客户端命令，"-u"后面跟链接数据库的用户，“-p” 表示需要输入密码
CREATE DATABASE dbname创建数据库
创建数据库testdb，命令执行如下：
mysql> create database testdb;
Query OK, 1 row affected (0.00 sec)
如果数据库已经存在，系统会提示：
mysql> create database testdb;
ERROR 1007 (HY000): Can't create database 'testdb'; database exists
查看系统中已有数据库
mysql> show databases;
选择要操作的数据库命令如下：
USE dbname
例如，选择数据库testdb：
mysql> use testdb;
Database changed
查看testdb数据库中创建的所有数据表：
mysql> show tables;
Empty set (0.00 sec)
删除数据库
drop database dbname
删除刚刚创建的testdb数据库
mysql> drop database testdb;
Query OK, 0 rows affected (0.01 sec)
