MYSQL-创建数据库及用户名：
mysql> create database yoon;
Query OK, 1 row affected (0.00 sec)
mysql> grant all privileges on yoon.* to 'yoon'@'%' identified by 'yoon';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
创建数据库及用户名为yoon-db：
mysql> create database `yoon-db`;
Query OK, 1 row affected (0.00 sec)
mysql> grant all privileges on `yoon-db`.* to'yoon'@'%' identified by 'yoon';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
" ` "为esc下面的符号
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