说明：

        create database a-b，会提示报错

        ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-b' at line 1

解决办法：

        -视为命令符，如果名称带有时，需要将数据库名用``包起来，create database `a-b`